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: Medicine
[{'content': 'Reverse transcriptase of hepatitis B virus is coded on the following gene - \nSelect and explain. \nA. C gene, B. S gene, C. P gene, D. X gene', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]