Match the following:
$$\begin{array}{cccc}\text{(1)}& \text{Pleiotropy}& \text{(a)}& \text{Sickle cell anemia}\\ \text{(2)}& \text{Sex linked disease}& \text{(b)}& \text{Colour blindness}\\ \text{(3)}& \text{Sex limited trait}& \text{(c)}& \text{Albinism}\\ \text{(4)}& \text{Tyrosinase}& \text{(d)}& \text{Beard in males}\end{array}$$

The correct option is A 1-a, 2-b, 3-d, 4-c
Sickle cell anemia is an example of pleiotropy.
Colour blindness is a sex linked disease.
Beard in males is a sex limited trait.
A mutation in the tyrosinase gene causes albinism.
Hence, the correct match is:
$$\begin{array}{cccc}\text{(1)}& \text{Pleiotropy}& \text{(a)}& \text{Sickle cell anemia}\\ \text{(2)}& \text{Sex linked disease}& \text{(b)}& \text{Colour blindness}\\ \text{(3)}& \text{Sex limited trait}& \text{(d)}& \text{Beard in males}\\ \text{(4)}& \text{Tyrosinase}& \text{(c)}& \text{Albinism}\end{array}$$