On which chromosome of each parent is the gene controlling $\beta$-thalassemia located?

Given below is a pedigree chart of a family with five children. It shows the inheritance of attached earlobes as opposed to the free ones. The squares represent the male individuals and circles the female individuals. Which one of the following conclusions drawn is correct?

Sex-linked disorders are mostly . . . . . . .

If a colorblind man marries a woman with normal vision,what is the probability of their son being colorblind?

If both the mother and father are without pigments (albinism),then:

$A$ normal girl, whose mother is haemophilic, marries a male with no ancestral history of haemophilia. What will be the possible phenotypes of the offsprings?
$(a)$ Haemophilic son and haemophilic daughter.
$(b)$ Haemophilic son and carrier daughter.
$(c)$ Normal daughter and normal son.
$(d)$ Normal son and normal daughter.
Choose the most appropriate answer from the options given below: