\(A = \left[ {\begin{array}{*{20}{c}} {12}&6\\ 7&4 \end{array}} \right],\;B = \left[ {\begin{array}{*{20}{c}} 5&2\\ {10}&4 \end{array}} \right]\)
Which of the following statement is correct?
1
A is invertible, B is not invertible
2
B is invertible, A is not invertible
3
Both A and B are invertible
4
Both A and B are not invertible