Correct answer: A. for
Explanation:
The correct preposition here is “for”. We use “for” when indicating the purpose or reason for or intended recipient of something. In this case, the prescription is given for a specific purpose: treating the cough.
The structure is: [Remedy/Treatment] + for + [Ailment/Problem]
In this case, the prescription is meant to address or treat the cough.
Examples:
• I need some medicine for a headache.
• She bought a special cream for her rash.
• What is the cure for the common cold?
Other Options:
• B. with: This preposition means “accompanied by” or “using.” A prescription with a cough would mean the prescription and the cough were given together, which doesn’t make logical sense.
• C. at: This is used for specific locations or points in time (e.g., “look at me,” “arrive at 5 pm”). It does not indicate purpose.
• D. to: This indicates direction or connection (e.g., “give it to me,” “the key to the door”). While you give a prescription to a person, the prescription itself is for an illness.
Thus, “The doctor gave me a prescription for my cough” is grammatically correct because “for” is used to indicate the purpose of the prescription

Correct answer: B. on
Explanation:
The correct preposition here is “on”. We use “on” when talking about the subject or topic of a talk, lecture, or presentation.
• “On” is the standard preposition used to specify the subject or topic of a discussion, presentation, or talk. For example, “a talk on climate change” or “a presentation on health issues.”
• “Of” typically indicates possession or origin and is not used to introduce a subject of a talk.
• “For” is used to indicate purpose or recipient, but not to introduce the subject.
• “Off” refers to removal or separation, so it doesn’t fit in this context.
Examples:
• The professor delivered a lecture on ancient Roman history.
• We had a long discussion on climate change.
• He wrote a famous book on the theory of relativity.

Thus, “He gave a talk on the causes of dengue fever” is the correct because “on” is used to introduce the topic of the talk.

Correct answer: C. between
Explanation:
The correct preposition here is “between”. We use “between” when referring to a range or a span of time, especially when specifying the start and end points.
“Between” is used to indicate a time range or an interval between two points (e.g., “between 8 am and 12 noon”).
The structure is: between [time 1] and [time 2]
Examples:
• The shop is open between 9 am and 5 pm.
• You must choose between the two options.
• Please call me between lunch and dinner.

Other Options:
• “At” is used for specific points in time (e.g., “at 8 am”), not for a range.
• “In” is used to refer to a period within a larger span (e.g., “in the morning”), but it’s not appropriate for specifying a range between two specific times.
• “On” is used for days and dates, not for ranges of time.

Correct answer: C. throughout
Explanation:
The correct preposition here is “throughout”. “Throughout” is used to express something that occurs during the entire length of time. In this case, “throughout the whole day” indicates that Rekha studies for the full duration of the day.
Examples:
• It rained throughout the night.
• The festival is celebrated throughout the country.
• She remained cheerful throughout her illness.

Other Options:
• “With” suggests accompaniment or manner, but it doesn’t convey continuous action over time.
• “From” indicates the starting point of an action, but not its continuation over time.
• “Under” typically refers to position or control, not the duration of an activity.
Thus, “Nowadays Rekha studies throughout the whole day” is correct because “throughout” conveys continuous action during the entire day.

The correct answer is B. in.
Grammar Rule:
The phrase “come in” is a common phrasal verb used to grant or request permission to enter a room or building. It functions as a complete idea where the preposition “in” is necessary to convey the meaning of entering an enclosed space.
• Come with requires an object (e.g., “Come with me”).
• Come at is used for attacking or approaching in a hostile way (e.g., “The dog came at me”), or with specific times (e.g., “Come at 5 o’clock”).
• Since the sentence has no object, “with” and “at” are incorrect.
Therefore, “May I come in?” is the grammatically correct and natural way to ask for permission to enter.

Correct answer: A. upon
Explanation:
The correct preposition here is “upon”. We use “prevail upon” to mean persuading or convincing someone to do something.
The structure is: prevail + upon + [person] + to + [action]
“Prevail upon” is a fixed expression in English that means to strongly convince or persuade someone to take an action. For example, “I prevailed upon him to accept the proposal.”
Examples:
I finally prevailed upon my father to lend me the car.
Could I prevail upon you to help me with this heavy box?

Other Options:
• “Against” typically means opposition or resistance, and doesn’t fit with the meaning of persuading someone.
• “To” is used for direction, but it’s not appropriate in this phrase.
• “Above” refers to a higher position and doesn’t fit in this context.

Correct answer: A. from
Explanation:
The correct preposition here is “from”. We use “from” to indicate the source or origin of something, in this case, the story being taken or adapted from “The Arabian Nights.”
Grammar Rule:
• “From” is used when referring to the source or origin of something. For example, “This story has been taken from the Arabian Nights” means that the story has been adapted or derived from that collection.
• “Of” typically refers to possession or association, not the source.
• “By” is used to indicate the creator or agent of an action (e.g., “written by someone”).
• “With” usually indicates accompaniment or tools, and does not fit in the context of indicating the origin of a story.
Thus, “This story has been taken from the Arabian Nights” is grammatically correct because “from” indicates the origin or source of the story.
Let us look at the usage of the given options:
We use from used to show the place where someone or something starts.
Example: She sent me a postcard from Bermuda.
We use of when we want to show that people or things relate to other things or people.
Example: Tiffany stared at the floor of her room.
We use by meaning ‘not later than’ to refer to arrangements and deadlines.
Example: The postman is always here by 17 am.
We can use ‘with’ when you’re talking about people, or things being together.
Example: I was with Jane yesterday when the accident happened

Correct answer: B. on, in
Explanation:
The correct prepositions are “on” and “in”.
• “On” is used when referring to working on a farm. A farm is generally viewed as an open area, and “on” is used to describe working on land or large properties like farms, fields, etc.
• “In” is used when referring to working in a bank, as a bank is a building or enclosed space, and “in” is used to describe being inside such places.
Grammar Rule:
• “On” is typically used for open spaces, surfaces, or areas (e.g., “on a farm,” “on a field”).
• “In” is used for enclosed spaces or specific locations (e.g., “in a room,” “in a bank”).
Examples:
He has worked on a ranch all his life.
My brother has a job in a supermarket.

Thus, the correct pair is “on, in”: “Jyoti is working on a farm, and her mother is working in a bank.”

Correct answer: A. to, for
Explanation:
The correct prepositions are “to” and “for”.
• “Indebted to” is a common phrase used to indicate who someone owes something to. So, “He is indebted to his friend” means that his friend is the person to whom he owes something. The preposition “to” is used to indicate the person to whom the debt is owed.
Structure: indebted + to + [person/organization]
• “Indebted for” is used to describe the reason or cause for the indebtedness, in this case, the large sum of money. So, “indebted for a large sum” indicates the specific reason for the debt. The preposition “for” is used to indicate the reason or the thing for which the debt is owed.
Structure: indebted + for + [reason/thing]

Examples:
• I am deeply indebted to my teacher for her guidance.
• We are indebted to the volunteers for their hard work.
Thus, answer is – “He is indebted to his friend for a large sum”

Correct answer: C. on
Explanation:
The correct preposition here is “on”. We use “on” when referring to an object resting or placed on a surface.
• “On” is used to indicate that something is resting on or supported by a surface. For example, “My watch is on the table” means the watch is placed on the surface of the table.
• “In” is used for enclosed spaces (e.g., “in a box” or “in a drawer”).
• “At” is used for specific locations or points (e.g., “at the door” or “at the table”).
• “Of” is used to show possession or association, not location.
Thus, “My watch is on the table” is grammatically correct because “on” is used to describe something placed on a surface.