Q. Which of the following disorders is not hereditary?
A) Haemophilia
B) Cataract
C) Sickle cell anaemia
D) Colour blindness
Explanation
Cataract is an eye disorder in old age, in which the flexibility of the lens declines so, that the lens become less convex on both sides. Simultaneously, it may become somewhat opaque, acquire an amber colour and increased in its density.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.