Which of the following is a singular matrix?

[4, 3 6, 2]

[4, 2 6, 3]

[4, 2 3, 6]

None of these

A matrix is singular when its determinant is 0.

[4, 2; 6, 3]

Det = (4×3) - (2×6) = 12 - 12 = 0 → Singular