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JEE Math Practice Question

If $$A = \left[ {\begin{matrix} 2 & { - 3} \\ { - 4} & 1 \\ \end{matrix} } \right]$$, then adj(3A2 + 12A) is equal to

  1. A.$$\left[ {\begin{matrix} {51} & {63} \\ {84} & {72} \\ \end{matrix} } \right]$$
  2. B.$$\left[ {\begin{matrix} {51} & {84} \\ {63} & {72} \\ \end{matrix} } \right]$$
  3. C.$$\left[ {\begin{matrix} {72} & {-63} \\ {-84} & {51} \\ \end{matrix} } \right]$$
  4. D.$$\left[ {\begin{matrix} {72} & {-84} \\ {-63} & {51} \\ \end{matrix} } \right]$$

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