Two trains A & B are travelling in the same direction at a certain speed. Length of the train A is 300 metres and the speed of the train B is 30km/hr. The train A passes a man who is walking at a speed of 4km/hr along the line in the same direction as 'A' in 30 seconds.
If the train A reached the station in 15 minutes after it had passed the man. In what time the man reached the station?

Options

A. A)1 hour
B. B)1.5 hours
C. C)2 hours
D. D)2.5 hours