If veca, vecb, vecc are three non-zero v...

If `veca, vecb, vecc` are three non-zero vectors such that `veca + vecb + vecc=0` and `m = veca.vecb + vecb.vecc + vecc.veca`, then:

A

`m lt 0`

B

`m gt 0`

C

`m=0`

D

m=3

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A

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