Which of the following diseases is caused by protozoa? A Typhoid B Pneumonia C Malaria D Ringworm

To determine which of the diseases is caused by protozoa, we need to analyze each option:

A) Typhoid: Typhoid is not caused by protozoa. It is caused by the bacterium Salmonella typhi.

B) Pneumonia: Pneumonia is not caused by protozoa either. It is commonly caused by bacteria, viruses, or fungi.

C) Malaria: Malaria is indeed caused by protozoa. The disease is caused by the Plasmodium parasite, which is transmitted to humans through the bite of infected mosquitoes.

D) Ringworm: Ringworm is not caused by protozoa. It is a fungal infection of the skin, hair, or nails.

Therefore, the disease caused by protozoa is C) Malaria.