If the vectors phati+hatj+hatk, hati+qha...

If the vectors `phati+hatj+hatk, hati+qhatj+hatk and hati+hatj+rhatk(p!=q!+r!=1)` are coplanar then the value of `pqr-(p+q+r)` is (A) 0 (B) -1 (C) -2 (D) 2

A

`-2`

B

2

C

0

D

`-1`

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The correct Answer is:

A

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