If the vectors overline(a)=hat(i)-hat(j...

If the vectors `overline(a)=hat(i)-hat(j)-6hat(k), overline(b)=hat(i)+phat(j)+4hat(k), overline(c)=2hat(i)-5hat(j)+3hat(k)` are coplanar, then p=

A

`-9`

B

`9`

C

`-3`

D

`3`

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The correct Answer is:

C

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