The output waveform $Q$ shown in the figure below represents:

Note that the initial value of the output is zero.

Output $1$

$0$

Select one:

a$.$ JK flip$-$flop at the rising edge when input $1=J$ and input $2=K$

b$.$ JK flip$-$flop at the falling edge when input $1=J$ and input $2=K$

c$.$ JK flip$-$flop at the falling edge when input $1=K$ and input $2=J$

d$.$ JK flip$-$flop at the rising edge when input $1=K$ and input $2=J$