If (x - 2) is a factor of (x2 + 3qx - 2q), then the value of q is :

Answer: D. -1

Since (x - 2) is a factor, so x = 2 will make (x2 + 3qx - 2q) zero.
So, 4 + 6q - 2q = 0  or  q = -1.