This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
[{'content': "What's the type of sampling, if a random sample is taken from a characteristic population. eg. Hindus, Muslims, Christian etc- \nSelect and explain. \nA. Simpe random, B. Stratified random, C. Systematic random, D. Cluster", 'role': 'user'}, {'content': "Answer: B \nExplanation: Stratified random sample is deliberately drawn in a systematic way so that each poion of the sample represents corresponding strata of universe. Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 913", 'role': 'assistant'}]