This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Avascular necrosis and osteochondroses, Subject name: Anatomy
[{'content': 'Sever&;s disease involves which of the following bone ? \nSelect and explain. \nA. lunate, B. Tibial tubercle, C. calcaneum, D. Navicular', 'role': 'user'}, {'content': 'Answer: C \nExplanation: type of osteochondritis bone affected Kienbock Lunate osgood shalter tibial tuberosity Sever&;s Calcaneum Kohler Navicular ref : maheswari 9th ed', 'role': 'assistant'}]