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': 'Berksonian bias is a type of? \nSelect and explain. \nA. Selection bias, B. Interviewer bias, C. Information bias, D. Recall bias', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]