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If `vec a, vec b, vec c` are unit vectors such that `vec a + vec b + vec c = vec 0`, then the value of `vec a . vec b + vec b.vec c + vec c vec a` is equal to

A

1

B

3

C

minus 3/2

D

44230

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Verified by Experts

The correct Answer is:
C
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HIMALAYA PUBLICATION-COMMON ENTRANCE TEST - 2017-QUESTION BANK
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