Question

Fill in the blank with the most appropriate option:
_________ his experiments, Faraday made an important discovery.

• A. While
• B. During
• C. Since
• D. For

Answer 1

Answer: (B)

During

Option B: 'During' refers to a course of time. When placed in the given sentence, it completes the meaning. During (In the course of time) of his experiments, Faraday made an important discovery. Hence option B is correct.

Option A: 'While' refers to two actions that are happening at the same time. The meaning applies here, but the word isn't suitable. This is because 'while' as an adverb would be used in a phrase, where the verb should be present. The first half of the sentence "his experiments" doesn't have a verb, hence A is incorrect.

Option C: 'Since' refers to a point of time after which an action began and continues in the present. For e.g. 'living since years'. The action isn't continuing in the given statement, hence C is incorrect.

Option D: 'For' refers to a period of time. The meaning isn't suitable for the sentence, hence D is also incorrect.