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If [vec a vecb vec c] ne 0 and vecP=(ve...

If `[vec a vecb vec c] ne 0 ` and `vecP=(vec b xx vec c)/([veca vecb vec c]), vecq=(vec c xx veca)/([veca vec b vec c]), vec r =(vec a xx vec b)/([veca vecb vec c ])`, then `veca. vecp+ vecb. vecq+ vec c.vecr` is equal to …………

A

0

B

1

C

2

D

3

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The correct Answer is:
D
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