The locus of the midpoints of the chords of the circle x2+ y2 + 4x - 6y - 12 = 0 which subtend an angle of π/3 radians at its circumference is:
(A) (x - 2)2 + (y + 3)2 = 6.25
(B) (x + 2)2 + (y - 3)2 = 6.25
(C) (x + 2)2 + (y - 3)2 = 18.75
(D) (x + 2)2 + (y + 3)2 = 18.75
