Which one is a unit vector ?
(A) ??3 i^ + ??3 j^ + ??3 k^
(B) 1/??3 i^ + 1/??3 j^ +1/ ??3 k^
(C) ??3 / 3 i^ + ??3 / 3 j^ + ??3 / 3 k^
(D) Both B and C are correct
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