A PN flip$-$flop has four operations: clear to $0,$ complement, no change, and set to $1,$ when inputs $P$ and $N$ are $00,01,10,$ and $11,$ respectively. The PN flip$-$flop can be converted to a JK flip$-$flop when

a$.J\frac{?}{b}=ar(P)$ and $K=N$

b$.J=N$ and $K\frac{?}{b}=ar(P)$

c$.J=P$ and $K\frac{?}{b}=ar(N)$

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