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)