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If A = |{:(p,q,r),(r,p,q),(q,r,p):}|and...

If A = `|{:(p,q,r),(r,p,q),(q,r,p):}|and A A ^(T) = I "then" p^(3) + q^(3) + r^(3)` =

A

`pm 1`

B

pqr

C

3pqr

D

`3pqrpm 1`

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The correct Answer is:
D
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