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': 'All of the following are random sampling methods except- \nSelect and explain. \nA. Simple random, B. Cluster sampling, C. Stratified random, D. Quota sampling', 'role': 'user'}, {'content': 'Answer: D \nExplanation: <p> Quota sampling. Reference:Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:850. <\\p>', 'role': 'assistant'}]