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If direction cosines of a vector of mag...

If direction cosines of a vector of magnitude 3 are `2/3 , - 9/3 , 2/3 and a gt 0 ` , then vector is _______

A

`2hat(i) - hat(j) +2hat(k)`

B

`hat(i) +2hat(j) +2hat(k)`

C

`2hat(i) +hat(j) +2hat(k)`

D

`hat(i) - 2hat(j) +2hat(k)`

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