A) Non- singular square matrix does not have a unique inverse
B) Determinant of a non-singular matrix is zero
C) If \[{A}'=A,\]then A is a square matrix
D) If \[|A|\,\ne 0\], then \[|A.adj\,A|\,=\,|A{{|}^{(n-1)}}\], where \[A={{[{{a}_{ij}}]}_{n\times n}}\]
Correct Answer: C
Solution :
If \[{A}'=A\], then order of \[{A}'\] will be same to order of A. So it is a square matrix.
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