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If `a!=b` and differences between the roots of the equations `x^2+ab+b=0 and x^2+bx=a=0` is the same then (A) `a+b+4=0` (B) `a+b-4=0` (C) `a-b+4=0` (D) `a-b-4=0`

A

a + b + 4 = 0

B

a + b - 4 = 0

C

a - b + 4 = 0

D

a - b - 4 = 0

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