A person riding a bicycle observes a passenger sitting in the bus. He finds that the passenger closed his glass window displacing 25 cm in forward direction with a constant speed in 1 sec. Bus overtakes the cyclist in 2 sec. Initially the person was at the middle of the bus as shown in the given figure. Length of the bus is 20 m. If, both the person and bus are moving with constant speed in the same direction, then velocity of the glass window with respect to the person was
A0.25 m/s
B2.5 m/s
C5.25 m/s
D3 m/s