Let f(x) = x2 + b1x + c1 , g(x) = x2 + b2x + c2 , α , β be real roots of f(x) = 0 and α + δ , β + δ be real roots of g(x) = 0, minimum value of y = f(x) be - 1/4 and minimum value of y = g(x) occurs at x = 7/2.
The value of b2 is
(A) 6
(B) -7
(C) 8
(D) 7