Which of the following relations is valid for Boolean algebra:

The diagram of a logic circuit is given below. The output of the circuit is represented by:

The following configuration of gates is equivalent to:

To get an output $1$, the input $\mathrm{ABC}$ should be:

The circuit-shown here is logical equivalent of:

Which of the following will have an output of $1$:

(a)

  (b) 

(c) 

(d)

The logic symbols shown here are logically equivalent to:

The combination of the gates shown will produce

The combination of the gates sown will produce: