A women with normal vision marries a man with normal vision and gives birth to a colourblind son. Her husband dies and she marries a colourblind man. Wht is the probability of heer children having the abnormality :-
A. `50%` colourblins sons + `50%` colourblind daughters
B. All sons colourblind & daughter carrier
C. All daughter colourblind & sons normal
D. `50%` sons colourblind and all daughters normal
