Official PYQ · 2021Set 1 · Q31Sequential CircuitsMCQ2 marks

GATE EC 2021 Set 1 Q31 — Sequential Circuits

The propagation delays of the $\text{XOR}$ gate, $\text{AND}$ gate and multiplexer $\text{(MUX)}$ in the circuit shown in the figure are $4\:ns$ , $2\:ns$ and $1\:ns$ , respectively.

If all the inputs $\text{P, Q, R, S and T}$ are applied simultaneously and held constant, the maximum propagation delay of the circuit is

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Answer: C

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Published 10 Oct 2026

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