Help please!! 20 point question!! Which equation represents the general form a circle with a center at (-2, -3) and a diameter of 8 units?
a. x2 + y2 + 4x + 6y - 51 = 0
b. x2 + y2 - 4x - y -51 = 0
c. x2 + y2 + 4x + 6y – 3 = 0
d. x2 + y2 - 4x - 6y - 3 = 0