Counters - Technical MCQs

Q1:

The counter circuit and associated waveforms shown below are for a(n) ________ counter, and the correct output waveform for QB is shown by waveform ________.

A synchronous, a

B asynchronous, b

C synchronous, c

D asynchronous, d

ANS:C - synchronous, c

I think the correct answer is asynchronous, d.