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: Surgery
[{'content': 'The high risk groups for transmission of HIV virus include the following except \nSelect and explain. \nA. Homosexuals, B. Haemophiliacs, C. Children of HIV mothers, D. Health care workers', 'role': 'user'}, {'content': 'Answer: D \nExplanation: In health care workers there is small but definite risk.', 'role': 'assistant'}]