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The unit vector parallel to the resultan...

The unit vector parallel to the resultant of the vectors A = 4i+3j + 6k and B = -i + 3j-8k is

A

`(1)/(7) (3 hat(i) + 6hat(j) - 2hat(k))`

B

`(1)/(2) (3hat(i) + 6hat(j) + 2hat(k))`

C

`(1)/(49) (3 hat(i) + 6hat(j) - 2hat(k))`

D

`(1)/(49) (3hat(i) - 6hat(j) + 2hat(k))`

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The correct Answer is:
A
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