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: Forensic Medicine
[{'content': 'Which of the following is true for 8yr old boy. \nSelect and explain. \nA. 8 Permanent, 16 Temporary tooth, B. 4 Temporary, 20 Permanent tooth, C. 12 Temporary, 12 Permanent tooth, D. 4 Permanent, 20 Temporary tooth', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Number of permanent teeth\xa0= (Age - 5 ) × 4\nSo,\xa0Number of permanent teeth\xa0= (8\xa0- 5 ) ×\xa04\xa0= 12', 'role': 'assistant'}]