Topic: Subject Verb Agreement,

Best Answer Explained in Below-:

In the sentence "One of my friends --- a student of Rajshahi University," the correct choice is "is" because it establishes a clear and direct relationship between the subject and its complement.

Firstly, the phrase "One of my friends" indicates a singular subject. In English grammar, when we refer to "one of," we are highlighting a single entity from a group, which requires a singular verb. Therefore, we use "is" rather than "are," as the latter would only be appropriate with a plural subject.

The verb "is" serves as a linking verb that connects the subject ("One of my friends") with its predicate ("a student of Rajshahi University"). This predicate identifies or describes the subject, indicating the status or identity of the friend in question. Other options, such as "is being," are inappropriate here because they suggest ongoing action or development rather than a definitive state of being.

In summary, "is" is the correct choice because it appropriately agrees with the singular subject and functions effectively to establish identity within the sentence structure.