This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
[{'content': 'In a community of 3000 people, 80% are Hindus 10% muslims, 5% \nSelect and explain. \nA. Simple random, B. Stratified random, C. Systematic random, D. Inverse sampling', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]