For the two-port network shown below, the short-circuit admittance parameter matrix is
1
\(\begin{bmatrix} 4 & -2 \\\ -2 & 4 \end{bmatrix}S\)
2
\(\begin{bmatrix} 1 & -0.5 \\\ -0.5 & 1 \end{bmatrix}S\)
3
\(\begin{bmatrix} 1 & 0.5 \\\ 0.5 & 1 \end{bmatrix}S\)
4
\(\begin{bmatrix} 4 & 2 \\\ 2 & 4 \end{bmatrix}S\)