This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable Diseases, Subject name: Social & Preventive Medicine
[{'content': 'Disease spreading through water is: \nSelect and explain. \nA. Hepatitis B, B. Hepatitis C, C. HIV, D. Typhoid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans: d (Typhoid) Ref: Park, 19 ed, p. 571This is a direct pick from park.Water related disease are:BiologicalChemicalBiological1) Presence of infectious agent:Viral-Bacteria-Protozoa-Helminth-Leptospiral-Hep ATyphoidAmoebiasisRoundwormWeils diseaseHepEParatyphoidGiardiasisthreadworm Polio,Cholera hydatid disease RotaE. coli diarrhoea 2) Presensce of aquatic hostSnail:Cyclops:SchistosomiasisGuinea wormFish tape wormChemical: Pollutants like detergents, solvents, heavy metals, dyes, ammonia, sulphides, toxic and biocidal compounds etc.', 'role': 'assistant'}]