If a,b,c be unit vectors such that a.b =...

If a,b,c be unit vectors such that a.b = a.c = 0 and the angle between b and c is `pi//6` then a =

A

`+- (a xx c)`

B

`+- 2 (a xx c)`

C

`+- (b xx c)`

D

`+- 2(b xx c)`

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Verified by Experts

The correct Answer is:

D

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