Concept:A singular matrix is a square matrix with determinant equal to zero, so it has no inverse.Explanation:A matrix is singular if its determinant is 0.A matrix is non-singular if its determinant is not 0.Check the determinant of each option.For option D:36816=(3)(16)−(8)(6)=48−48=0Since the determinant is 0, matrix D is singular.Answer:D. [36816]