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If P=[(1,2,4),(3,1,0),(0,0,1)], Q=[(1,-2...

If `P=[(1,2,4),(3,1,0),(0,0,1)], Q=[(1,-2,-3),(-3,1,9),(0,0,-5)]`then `(PQ)^(-1)` equals to

A

(a) zero matrix

B

(b) `I_(3)`

C

(c) diag `[-5, -5, -5]`

D

(d) `-(1)/(5)I_(3)`

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The correct Answer is:
D
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