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Let ` vec a , vec b, vec c` be three non-zero vectors such that any two of them are non-collinear. If ` vec a+2 vec b` is collinear with ` vec ca n d vec b+3 vec c` is collinear with ` vec a` then prove that ` vec a+2 vec b+6 vec c= vec0`

A

`lambda vec a`

B

`lambda vec b`

C

`lambda vec c`

D

`vec 0`

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