If the circumference of the circle x^(2...

If the circumference of the circle ` x^(2) + y^(2) + 8x + 8y - b = 0` is bisected by the circle ` x^(2) +y^(2) - 2x + 4y + a = 0 ` then a + b equals

A

50

B

56

C

`-56`

D

`-34`

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The correct Answer is:

C

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