A, B, C, D and E are five taps. Capacity of B is 2 times of A, capacity of C is 3 times that of A. Capacities of D and E are 4 and 5 times that of A respectively. In the first case A, C and E act as input pipes and B and D act as output pipes.

In the second case C, D , E act as input pipe and A and B act as output pipes.

If A and D working together as input pipes can fill the tank in 4 hours, then what is the difference in time required to fill the tank in the first and second case stated above?
a. 4.44 hour
b. 3.33 hour
c. 2.22 hour
d. 1.11 hour
e. None of these