The angle subtended at the point (1,2,3)...

The angle subtended at the point (1,2,3) by the points P(2, 4, 5) and Q(3,3,1) is a) `90^(@)` b)`60^(@)` c)`30^(@)` d)`0^(@)`

A

`90^(@)`

B

`60^(@)`

C

`30^(@)`

D

`0^(@)`

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The correct Answer is:

A

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