Which logic gates is represented by the following combination of logic gates?

This is a case of AND gate. Input and output are shown below
$\therefore$ $y=\overline{\overline{A}+\overline{B}}=\overline{\overline{A}.\overline{B}}=AB$ (since $\overline{A}+\overline{B}=\overline{A}.\overline{B}$)