Find the center and radius for the circle defined by the equation: x^2+y^2+5x-y+2+0

A) (-5/2, 1/2); √6

B) (5/2, 1/2); 3√2 / 2

C) (5/2, 1/2); √6

D) (-5/2, 1/2); 3√2 / 2

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