One solution each is given for four quadratic equations. Assuming that each quadratic equation has two solutions, what is the second solution for each equation?

1. x = 5 - 4i
2. x = -4 - 5i
3. x = 4 + 5i

a. x = 4 - 5i
b. x = 5 + 4i
c. x = -5 -4i
d. x = -4 + 5i