The output of an $OR$ gate is connected to both the inputs of a $NAND$ gate. The combination will serve as

Which of the following circuits has the same output as that of the given circuit?

In a digital circuit for three input signals $(A, B, \text{ and } C)$, the final output $(Y)$ should be such that for inputs:
| $A$ | $B$ | $C$ |
|---|---|---|
| $0$ | $0$ | $0$ |
| $0$ | $0$ | $1$ |
| $0$ | $1$ | $0$ |
the output $(Y)$ should be $0$, and for all other cases, it should be $1$. Which of the following digital circuits will give such output?

Four logic gates are connected as shown in the figure. If the inputs are $A=0$,$B=1$ and $C=1$,then the values of $y_1$ and $y_2$ respectively are

Draw the output signals $C_1$ and $C_2$ for the given combination of gates as shown in the figure.

The given logic circuit is equivalent to which gate?