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If vec a, vec b and vec c are non coplan...

If `vec a, vec b` and `vec c` are non coplanar unit vectors such that `vec a xx (vec b xx vec c) = (vec b + vec c)/sqrt2`, then

A

angle between `vec a and vec b is pi/4`

B

angle between `vec a and vec b is (3pi)/4`

C

angle between `vec a and vec c is (3pi)/2`

D

angle between `vec b and vec c is (3pi)/4`

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The correct Answer is:
B
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