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Let vecb and vecc be non-collinear vecto...

Let `vecb` and `vecc` be non-collinear vectors. If `veca` is a vector such that `veca.(vecb + vecc)=4` and `veca xx (vecb xx vecc)=(x^(2) - 2x + 6)vecb + sin y.vecc`, then (x,y) lies on the line:

A

`x+y=0`

B

`x-y=0`

C

`x=1`

D

`y=pi`

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The correct Answer is:
C
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