Which of the following lists of diseases, their causes and transmission is CORRECT?

A.

Cholera, virus, severe diarrhoea, infected water

B.

Malaria, protozoan, high fever, contact with infected person

C.

Syphilis, virus, veneral disease, sexual intercourse

D.

small pox, virus, skin with blister, close contact with infected person

E.

 Sleeping sickness, bacteria, tiredness, headache and dozing, tsetsefly bite

Correct answer is D

No explanation has been provided for this answer.