In the question, a sentence has been given in an active/passive voice. Out of the given four alternatives, suggest the one which best expresses the given sentence in passive/active voice.
Steve writes a book on African culture.
1
Steve had written a book on African culture.
2
A book on African culture has been written by Steve.
3
A book on African culture is written by Steve.
4
Steve has written written a book on African culture.