Write True$/$False for the following:

$($a$)$ D flip flop can be constructed from S$-$R flip flop.

$($b$)$ When enable control switch is low, there is change in the output.

$($c$)$ When $D=1$ then output $Q=0.$

$($d$)$ A flip flop stores a $0$ when SET and a $1$ when RESET.