matrix rank and order

[ranjankumarnayak5]

[ranjankumarnayak5]

Friends please help me in getting the answer of ths question.

[Var1995]

ans is a. this is a theorem: the rank of the product of a matrix by its transpose is equal to the rank of the matrix.

[ranjankumarnayak5]

Thanks a lot.Sir

[Var1995]

I'm not "Sir".

[ranjankumarnayak5]

Sorry, "Madam". Thanks