T$6.$ In figure initially $A=1$ and $B=1,$ the input $B$ is now replaced by a sequence $101010$dots the outputs $x$ and $Y$ will be

$($a$)$ Fixed at $0$ and $1$ respectively

$($b$)$ Fixed at $1$ and $0,$ respectively

$($c$)x=1010$dots while $Y=1010$dots

$($d$)x=1010,$ while $Y=0101$dots