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If `a = I + j, b = j + k and c = k +i`, a unit vector parallel to `a + b + c` is

A

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

B

`(hat(i) + hat(j) + hat(k))/(sqrt(3))`

C

`(hat(i) + hat(j) + hat(k))/(2sqrt(3))`

D

`(vec(a) + vec(b) + vec(c ))/(sqrt(3))`

Text Solution

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The correct Answer is:
B
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