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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:

1. $(1+x)$ is factor of $G(x)$
2. $(1-x)$ is factor of $G(x)$
3.  $(1+x^{2})$ is factor of $G(x)$
4. $x$ is factor of $G(x)$

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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

(1+x) is factor of G(x)

A) x+1 should be factor of G(x)

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