The correct answer is E. No Error.
The sentence “Many a man have been working under me” is grammatically incorrect. The correct sentence should be “Many a man has been working under me.”
The word “many” is an indefinite pronoun, which means that it refers to a group of people or things that is not specific. The word “a” is an indefinite article, which means that it refers to a single person or thing that is not specific. The word “man” is a common noun, which means that it refers to a person of any age or sex. The word “have” is a verb that is used to indicate that something has happened or is happening. The word “been” is a verb that is used to indicate that something has happened or is happening in the past. The word “working” is a verb that is used to indicate that someone is doing something. The word “under” is a preposition that is used to indicate that something is located below or beneath something else. The word “me” is a pronoun that is used to refer to the speaker.
In the sentence “Many a man have been working under me,” the word “have” is used incorrectly. The word “have” is used to indicate that something has happened or is happening in the present tense. However, the sentence is about something that has happened in the past. The correct verb to use in this sentence is “has.”
The sentence “Many a man has been working under me” is grammatically correct. The sentence is about a group of men who have been working under the speaker. The sentence is clear and concise, and it conveys the speaker’s message effectively.