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 at `(-3,""2)`
, then the radius of S is :
(1) `5sqrt(2)`
(2) `5sqrt(3)`
(3) 5
(4) 10
A. `5sqrt(3)`
B. 5
C. 10
D. `5sqrt(2)`