Question
Identify the gate and match $A, B, Y$ in bracket to check
✓
Answer
$Y\,=\,\overline{AB}.\overline{AB}=\,\overline{\overline{AB}}\,+\,\overline{\overline{AB}\,}=\,AB\,+\,AB\,=\,AB$
In this case output $Y$ is equivalent to $AND$ gate.
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