Let alpha+iotabeta ,alpha,betaepsilonR b...

Let `alpha+iotabeta` ,`alpha,betaepsilonR` be a root of `x^3+qx+r=0`If `gamma` be a real root of equation `x^3+qx+r=0` then `gamma`
(A) `-2alpha`
(B) `alpha`
(C) `2alpha`
(D) `-alpha`

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