Let a = i -2 j + k and b = i - j + k be two vectors. If c is a vector such that b c = b a and c a =0, then c...

Question

Let a = i -2 j + k and b = i - j + k be two vectors. If c is a vector such that b c = b a and c a =0, then c b is equal to :

Accepted Answer

(C)

JEE Main 2020 Mathematics question