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If one of the diameters of the circle, g...

If one of the diameters of the circle, given by the equation `x ^(2) + y^(2) + 4x + 6y -12 =0,` is a chord of a circle S, whose centre is `(2,-3), ` the radius of S is

A

`sqrt41` unit

B

`3sqrt5` unit

C

`5sqrt2` unit

D

`2sqrt5` unit

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