Of the four given options, choose the most appropriate one.

Correct option is A

The correct sentence is (a) One of the boys in the class was asked to bring a chalk from the staff room.
The phrase "one of the boys" refers to a single subject. Therefore, the verb must be singular, i.e., "was" is correct.
Grammatical Rule Used:
· Subject-Verb Agreement: When a sentence begins with "one of," the subject is singular, and the verb should agree in the singular form.
Grammatical Rule in Hindi:
"One of" के साथ क्रिया हमेशा एकवचन (singular) होती है, क्योंकि यह समूह में से केवल एक को संदर्भित करता है।