Which of the following statement are correct?
(A) A=[aij]n×n is a diagonal matrix if aij=0 when i=j
(B) A square matrix A=[aij] is called a symmetric matrix if aij=aji for all i,j
(C) A square matrix A=[aij] is called a skew-symmetric matrix if aij=−aji for all i,j
(D) For every square matrix A, there exist an identity matrix of the same order such that IA=AI=I
Choose the correct answer from the options given below:
Held on 29 May 2025 · Verified 13 Jul 2026.
(A), (B) and (C) only
(B), (C) and (D) only
(A) and (C) only
(B) and (C) only
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