. . . . . . . . only student to secure the first class is my friend. A. a B. an C. the D. no article

The correct answer is: D. no article

The article “a” or “an” is used before a singular noun that refers to a general or unspecified person, place, thing, or idea. In this case, the noun “student” is singular and refers to a specific person, my friend. Therefore, we do not use an article.

The article “the” is used before a singular noun that refers to a specific person, place, thing, or idea that has already been mentioned or is known to the reader. In this case, the noun “student” is singular, but it does not refer to a specific person. Therefore, we do not use the article “the.”

No article is used before a singular noun that refers to a general or unspecified person, place, thing, or idea. In this case, the noun “student” is singular and refers to a specific person, my friend. Therefore, we do not use an article.