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Given three non-zero, non-coplanar vectors `veca, vecb and vecc`. `vecr_1= pveca + qvecb+ vecc and vecr_2= veca + pvecb+ qvecc`. If the vectors `vecr_1 + 2vecr_2 and 2 vecr_1 + vecr_2` are collinear, then `(p, q)` is

A

`(0,0)`

B

`(1,-1)`

C

`(-1,1)`

D

`(1,1)`

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The correct Answer is:
D
d
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