Topic: Subject Verb Agreement,

Best Answer Explained in Below-:

The sentence "Many a — tried to complete the work." requires a singular subject and a corresponding singular verb to be grammatically correct. The phrase "Many a" is an idiomatic expression that denotes "many" but is used with a singular noun. This construction emphasizes the individual experiences of many people rather than referring to them collectively.

Let's break down the options:

A) "men has" - Incorrect because "men" is plural, and "has" is singular.
B) "men have" - Incorrect for the same reason; "men" does not agree with "has."
C) "man have" - Incorrect because "man” is singular and should be paired with “has.”
D) "man has" - Correct, as it uses "man" (singular) with the appropriate verb "has."

Thus, "Many a man has tried to complete the work" correctly reflects the singular nature of “man” and properly conjugates the verb “has” to match. This ensures that the statement conveys the intended meaning—highlighting individual attempts to complete the work.