The following symbols represent some logic gates. The $XOR$ gate and $NOR$ gate are respectively:

In the logic circuit diagram,when all the four inputs $A, B, C, D$ are $1$,the outputs $Y_1, Y_2, Y_3$ are respectively $(1, 1, 0)$. When all the inputs $A, B, C, D$ are changed to $0$,the outputs $Y_1, Y_2, Y_3$ respectively change to

For the given logic gates combination,the correct truth table will be

In the given network of $AND$ and $OR$ gates, the output $Q$ can be written as (assuming $n$ is even):

Which of the following is an inverter gate?

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