This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sampling, Subject name: Social & Preventive Medicine
[{'content': 'Which of the following is example of Non-random sampling \nSelect and explain. \nA. Probability sampling, B. Non-purposive sampling, C. Cluster random sampling, D. Clinical trial sampling', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Examples of Non-random (Non-probability sampling/ Purposive sampling) sampling: Convenience sampling Quota sampling Snow ball sampling Clinical trial sampling', 'role': 'assistant'}]