The sea looks (1)/ as if it has been (2)/ agitated by a storm. (3)/ No error. (4)

Options

A. 1 The sea looks
B. 2 as if it has been
C. 3 agitated by a storm.
D. 4 No error

Answer

2

Explanation

had been will replace has been because -
to show that a comparison is unreal, we use Past Tense with a present meaning after as if/as though.
Look at the examples given below:
She looks as if she were rich. She talks as if she were mad. Hence, as if it had been is the right usage.