This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
[{'content': 'Is a water washed disease \nSelect and explain. \nA. Malaria, B. Scabies, C. Tsunami, D. Leptospirosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]