The circuit diagram shows a combination of logic gates. When inputs $P$ and $Q$ change to state $0$ with inputs $R$ and $S$ still at state $1$,the states of outputs $X$,$Y$ and $Z$ change to:

The circuit diagram shows a logic combination with the states of outputs $X, Y$ and $Z$ given for inputs $P, Q, R$ and $S$ all at state $1$. When inputs $P$ and $R$ change to state $0$ with inputs $Q$ and $S$ still at $1$,the states of outputs $X, Y$ and $Z$ change to:

Identify the logic gate from the following with the same truth table characteristics as the logic circuit shown below.

If the output of a $NAND$ gate is given as input to a $NOT$ gate, the resultant gate is

The following figure shows a logic gate circuit with two inputs $A$ and $B$ and the output $Y.$ The voltage waveforms of $A, B$ and the output $Y$ are as given in the diagram. The logic gate is $:-$

An $AND$ gate