If the circle x^2 + y^2 + 6x -2y + k = 0...

If the circle `x^2 + y^2 + 6x -2y + k = 0` bisects the circumference of the circle `x^2 + y^2 + 2x- 6y-15=0` , then

A

21

B

`-21`

C

23

D

`-23`

Verified by Experts

The correct Answer is:

D

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