This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Identification, Subject name: Forensic Medicine
[{'content': 'First secondary ossification center appears in - \nSelect and explain. \nA. Lower end of femur, B. Upper end of humerus, C. Lower end of fibula, D. Upper end of tibia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ossification centre appears in lower end of femur in 36 weeks.Dr. Narayana Reddys Synopsis of Forensic Medicine & Toxicology 27th edition pg. 46.', 'role': 'assistant'}]