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': "'Sanitation barrier' implies - \nSelect and explain. \nA. Segregation of faeces, B. Personal hygiene, C. Elemination of flies, D. Water pollution", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Seggregation of faeces Sanitation barrier A disease cycle may be broken at several levels : segregation of faeces, protection of water supplies, protection food, personal hygeine, control of flies. o The most effetive step of all these, however, is to segregate the faeces and arrange for its proper disposal. o This is the concept of sanitation barrier.", 'role': 'assistant'}]