If the signal $x(t) = \large \frac{\sin(t)}{\pi t}$$*$$\large \frac{\sin(t)}{\pi t}$ with $*$ denoting the convolution operation, then $x(t)$ is equal to

- $\large\frac{\sin(t)}{\pi t}$
- $\large\frac{\sin(2t)}{2\pi t}$
- $\large\frac{2\sin(t)}{\pi t}$
- $\bigg(\frac{\sin(t)}{\pi t}\bigg)^2$