Consider the circuit of logic gates shown in the above figure. This combination of logic gates can be replaced by which logic gate?

The boolean expression of this arrangement is,For NOT gate,Y1=A¯ and Y2=B¯For NOR gate,Y=A¯¯+B¯=A¯¯⋅B¯¯Y=A⋅BTruth TableThus, the combination represents AND gate.