How many roots does the polynomial

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Correct option is C

Result used : (Rouche theorem) 

Let f(z) and g(z) be holomorphic (analytic) functions inside and on a closed contour C

in the complex plane. if |g(z)| < |f(z)| for all z on C, then f(z) and h(z) = f(z) + g(z)

have the same number of zeros inside C , counted with multiplicities.

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