Q 2319180019.     If the matrix `AB` is a zero matrix, then which one
of the following is correct?

NDA 2012 Paper 1 September
A

A must be equal to zero matrix or B must be equal to zero matrix

B

A must be equal to zero matrix and B must be equal to zero matrix

C

It is not necessary that either A is zero matrix or B is zero matrix

D

None of the above

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