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: Anatomy
[{'content': 'At the time of bih which of the following ossification centers are seen: \nSelect and explain. \nA. Lower end of femur, B. Calcaneum, C. Upper end of tibia, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A. i.e. Lower end of femur; B. i.e. Calcaneum; C. i.e. Upper end of tibia', 'role': 'assistant'}]