For which logic gate is the following statement true? The output is high if and only if all inputs are high.

If $A = 100101$ and $B = 110110$ are applied to $X-NOR$ gate,then the output will be

The logic circuit below has the truth table, same as that of

In a certain $2$-input logic gate,when inputs $A=0$ and $B=0$,then output $C=1$. And also when inputs $A=0, B=1$,then again output $C=1$. The gate must be

The output of the following logic circuit is:

What is the logic gate with one input and one output?