In the matrix $A=\begin{bmatrix}2 & 5 & 19 & -7\\35 & -2 & \frac{5}{2} & 12\\\sqrt 3 & 1 & -5& 17\end{bmatrix},$ write The order of the matrix.

Question

$\begin{array}{1 1} 12 \\ 4 \\ 3 \\ 3 \times 4 \end{array} $