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.
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