Q .     A vector `vecR` is given by` vec R =vec A xx(vecB xxvec C)`
Which of the following is true?

UPSEE 2016
A

`vecR `is parallel to` vecA`

B

`vecR `must be parallel to` vecB`

C

`vecR `must be perpendicular to ` vecB`

D

none of the options

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