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': 'With respect to dating of a bone, a bone more than 100 years old contain: Karnataka 11 \nSelect and explain. \nA. 7 amino acids, B. 9 amino acids, C. 6 amino acids, D. 8 amino acids', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. 7 amino acids', 'role': 'assistant'}]