Q 1164180055.     Let `veca=-i-k , vecb=-i+j` and `vecc=i+2j+3k` be three given vectors. If `vecr` is a vector such that `vecrxxvecb=veccxxvecb` and `vecr.veca=0`. Then the value of `vecr.vecb` is

JEE 2011
A

`0`

B

`1`

C

`2`

D

`9`

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