Q. A colour-blind woman married a normal man. They had 3 children, 2 sons and 1 daughter. What is the probability of their children being colour-blind?
A. The daughter will be normal but both the sons will be colourblind.
B. The daughter and one son will be normal, but another son will be colour-blind.
C. The daughter will be colour-blind, but both the sons will be normal
D. None of the children will be colourblind but carriers of the disease.