In each of the following questions two equations are given. Solve these equations and give answer:

Correct option is C

I: x² + 9x + 18 = 0
x² + 6x + 3x + 18 = 0
x (x + 6) + 3 (x + 6) = 0
(x + 6)(x + 3) = 0
x = -6, -3
II: y² + 2y – 15 = 0
y² + 5y – 3y – 15 = 0
y (y + 5) – 3 (y + 5) = 0
(y - 3)(y + 5) = 0
y = 3, -5