Let X be a square matrix. Consider the following two statements on X.
I. X is invertible.
II. Determinant of X is non-zero.
Which one of the following is TRUE?

A. I implies II; II does not imply I

B. II implies I; I does not imply II

C. I and II are equivalent statements

D. I does not imply II; II does not imply I

Answer: Option C