I read a book CHANGE into PASSIVE VOICE

A. A book is read by me
B. A book was read by me
C. A book has been read by me
D. Both A) and B)

ACTIVE: I read a book.

PASSIVE: i.e

book is read by me
book was read by me

both options A & B are possible because the word read is the 1st as well as 2nd form of the Verb ‘READ’. Here, it is unknown that which of the Verb is used, so it can be in the present or in the Past form.