If the line x + 2by + 7 = 0 is a dia...

If the line ` x + 2by + 7 = 0 ` is a diameter of the circle
` x^(2) + y^(2) - 6x + 2y = 0 `, then : b =

A

3

B

`-5`

C

`-1`

D

5

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The correct Answer is:

D

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