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Given a=2 hati +hat j +hat k, b =hati+2 ...

Given `a=2 hati +hat j +hat k, b =hati+2 hat j -hatk` and a unit vector c are coplanar if c is perpendicular to a , then c=

A

A `+-. (1)/(sqrt(3)) (hat(i)- hat(j) - hat(k))`

B

B `(1)/(sqrt(5)) (hat(i) -2hat(j))`

C

C `(-1)/(sqrt(3))hat(i)+ hat(j) + hat(k )`

D

D `+- .(1)/(sqrt(2)) (-hat(j) + hat(k ))`

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D
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