This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
Sanitary toilets can decrease incidence of all except 
Select and explain. 
A. Diarrhoea, B. Poliomyelitis, C. Malaria, D. Cholera
C: Malaria
Answer: C: Malaria 
Explanation: Diarrhea, Poliomyelitis, and cholera are transmitted by faeco-oral route Malaria is a vector-borne disease transmitted by Anopheles mosquito. Hence sanitary toilets and hand washing practices cannot prevent Malaria. Park's Textbook of Preventive and Social Medicine, 25th Edition, Pg 831