Which one of the following sets is correctly matched?
1. Diphtheria, pneumonia and leprosy ⟺ Hereditary
2. AIDS, syphilis and gonorrhoea ⟺ Bacterial
3. Colour blindness, haemophilia and sickle cell anaemia ⟺ Sex linked
4. Polio, Japanese-B encephalitis and Plague ⟺ Viral

A. Only 2

B. Only 3

C. 1 and 4

D. None of the above

Answer: Option D