In a ripple counter using edge-triggered JK flip-flops,

In a ripple counter using edge-triggered JK flip-flops, the pulse input is applied to—

1. Clock input of all flip-flops
2. Clock input of one flip-flop
3. J and K inputs of one flip-flop
4. J and K inputs of all flip-flops

In a ripple counter using edge-triggered JK flip-flops the pulse input is applied to clock input of one flip flop.