Which one of the following logic gates is called a Universal gate?

Write the truth table of $NAND$ gate.

The figure shows a combination of two $NOT$ gates and a $NOR$ gate. The combination is equivalent to a

The output $Y$ for the inputs $A$ and $B$ of the circuit is given by the truth table of the shown circuit:

In a $\text{NAND}$ gate, $A$ and $B$ are inputs and $Y$ is the output, then the correct option is

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