Which disease is caused by the deficiency of factor $VIII$?

Which one of the following disorders and its characteristic is correctly matched?

$A$ normal-visioned man,whose father was color-blind,marries a woman whose father was also color-blind. What is the probability that their first child,a daughter,will be color-blind (in $\%$)?

$A$ sex-linked recessive gene $c$ produces red-green colour blindness in humans. $A$ normal woman whose father was colourblind marries a colourblind man. Of all the girls born to these parents, what percentage is expected to be colourblind?

In a cross between a male and female, both heterozygous for sickle cell anaemia gene, what percentage of the progeny will be diseased? (In $ \%$ )

Marriages between close relatives and cousins are not advisable because