$$ \begin{aligned} &\text {Truth table for NAND gate is }\\\\ &\begin{array}{|c|c|c|} \hline \mathrm{A} & \mathrm{B} & \mathrm{Y}=\overline{\mathrm{A} \cdot \mathrm{B}} \\ \hline 0 & 0 & 1 \\ \hline 0 & 1 & 1 \\ \hline 1 & 0 & 1 \\ \hline 1 & 1 & 0 \\ \hline \end{array} \end{aligned} $$

On the basis of given input $\mathrm{A}$ and $\mathrm{B}$ the truth table is

$\mathrm{A}$	$\mathrm{B}$	$\mathrm{Y}$
1	1	0
0	0	1
0	1	1
1	0	1
1	1	0
0	0	1
0	1	1