The correct answers are:
A. Virus - Flu
The flu is a virus that is spread through the contact of germs and bacteria on the skin or in saliva. There are many different variations of the flu. It is essentially a parasite in the body.
B. Fungus - Yeast infection.
A fungal infection is a type of infection found in the skin and is treated with anti-fungal treatments. A yeast infection is typically found in the vagina or penis skin caused by the fungus candida.
C. Protist - Malaria
A protist is a diverse group of organisms that are not animals, plants or fungi. A certain type of protist is the protozoa which is what causes the disease Malaria.