The train had left (1)/ when he had reached (2)/ the station. (3)/ No error (4) ?

Options

A. 1 The train had left
B. 2 when he had reached
C. 3 the station.
D. 4 No error

Answer

B

Explanation

reached will replace had reached because - When two actions take place in the Past, the earlier action is in Past Perfect and the later action in Simple
Past Tense.
Look at the example given below:

Hence, when he reached is the right usage