The given truth table is correct for:
$P: 1, 1, 0, 0$
$Q: 1, 0, 1, 0$
$R: 1, 0, 0, 0$

The output $y$,when all three inputs are first high and then low,will respectively be

The figure shows $2$ $NAND$ gates followed by a $NOR$ gate. The system is equivalent to one gate $G$ with inputs $X, Y, Z$ and output $R$. What is $G$?

$A$ gate in which all the inputs must be low to get a high output is called:

The following configuration of gates is equivalent to $:-$

Identify the correct output signal $Y$ in the given combination of gates (as shown) for the given inputs $A$ and $B$.