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': '. In a sampling technique, every 10th unit of population is chosen. What is this type of sampling technique? \nSelect and explain. \nA. Systematic random sampling, B. Systematic sampling, C. Simple random sampling, D. Cluster sampling', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. a. Systematic random sampling', 'role': 'assistant'}]