Production of a rainbow by water droplets depends on…?

Question

a- differences of angles of incidence for lights of different colors

b- differences of angles of refraction for lights of different colors

c- differences of speed for lights of different colors

d- equality of index of refraction for lights of all colors

Answer 1

B- because angle of incidence is the same but angle of refraction changes due to difference in wavelenght of different colours.

Answer 2

b