Q. A colour-blind man marries a normal woman whose father was colour-blind. They have 3 children, two daughters and ason. What are the chances of their children being colour-blind?
A. One of the daughters will be colour-blind but another daughter and son will be normal.
B. Only the son will be colour-blind
C. Both the daughters will be colour-blind but the son will be normal.
D. One of the daughters will be colour-blind and the other normal, but the son has only 50% chance of being normal.