Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → c
$A=\begin{bmatrix}2&-1\\4&3\end{bmatrix}$
B = Co-factor matrix = $\begin{bmatrix}3&-4\\1&2\end{bmatrix}$
$Adj\, A = B^T=\begin{bmatrix}3&1\\-4&2\end{bmatrix}$
Correct answer: option 3
The correct answer is Option (3) → c
$A=\begin{bmatrix}2&-1\\4&3\end{bmatrix}$
B = Co-factor matrix = $\begin{bmatrix}3&-4\\1&2\end{bmatrix}$
$Adj\, A = B^T=\begin{bmatrix}3&1\\-4&2\end{bmatrix}$