A 3 bit synchronous counter uses FF with propagation delay time of 20 ns each. The maximum possible time required for change of state will be.

A 3 bit synchronous counter uses FF with propagation delay time of 20

1.	A 3 bit synchronous counter uses FF with propagation delay time of 20 ns each. The maximum possible time required for change of state will be.
A.	60 ns
B.	40 ns
C.	20 ns
D.	None
Answer» C. 20 ns