List of top Image Processing and Analysis Questions on 2D Convolution of Small Kernels asked in GATE GE

Which one of the following is the CORRECT outcome of convolution with zero padding of the two images given below?
\[ \begin{bmatrix} 1 & 1 \\ 1 & 1 \end{bmatrix} * \begin{bmatrix} 1 & 1 \\ 1 & 1 \end{bmatrix} \]