1) If A and B are two matrices such than rank of A= m and rank of B= n, then A) rank (AB)=mn B) rank (AB) ≤ rank(A) C) rank (AB) ≤ rank(B) D) rank (AB) ≤ min (rank A, rank B) Answer: Option DExplanation:∵ rank (AB ) ≤ rank (A) and rank (A B) ≤ rank (B) therefore rank (A B ) ≤ min (rank A, rank B)
