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P and Q are matrices such that both (P +...

P and Q are matrices such that both (P + Q) and (PQ) are defined.
Which of the following is true about P and Q?

A

P and Q can be any matrices but of the same order.

B

P and Q must be square matrices of the same order.

C

P and Q must be square matrices not necessarily of the same order.

D

Order of P and Q must be of the form `m times k` and `k times n` respectively, with no condition on m and n.

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