Ours . . . . . very regular class.

A. are

B. is

C. doesn’t

D. have

Answer: Option B

Solution(By Examveda Team)

When you are speaking of or for yourself, use "am." When you are talking about a person or a thing (in the singular), use "is." When you are talking to a person, and when you are talking about other people or things (in the plural), use "are." Here, it is "ours" is used as singular. Hence, is will be used.