Find the Inverse of the Matrix (If It Exists) $$\left[ \begin{array} { l l } 1 & 2 \\3 & 7\end{array} \right]$$

Multiple Choice

Find the inverse of the matrix (if it exists) . ​​ $$\left[ \begin{array} { l l } 1 & 2 \\3 & 7\end{array} \right]$$ ​

A) ​ $$\left[ \begin{array} { l l } 7 & 2 \\3 & 1\end{array} \right]$$
B) ​ $$\left[ \begin{array} { c c } 7 & - 2 \\- 3 & 1\end{array} \right]$$
C) ​ $$\left[ \begin{array} { l l } - 7 & - 2 \\- 3 & - 1\end{array} \right]$$
D) ​ $$\left[ \begin{array} { c c } - 7 & - 2 \\3 & 1\end{array} \right]$$
E) ​ $$\left[ \begin{array} { c c } - 7 & 2 \\3 & - 1\end{array} \right]$$