Let $G(x)$ be generator polynomial used for CRC checking. The condition that should be satisfied by $G(x)$ to correct odd numbered error bits, will be:
https://gateoverflow.in/1334/gate2009-48
Ans will be A
In this case polynomial generator should satisfy
(A) Polynomial generated shouldn’t be divisible by x
(B) It should be divisible by 1 + x i.e 1 + x is a factor of polynomial
A) x+1 should be factor of G(x)