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': 'Osteochondritis in Kohler&;s disease affects which bone ? \nSelect and explain. \nA. Lunate, B. Patella, C. Navicular, D. Femur head', 'role': 'user'}, {'content': 'Answer: C \nExplanation: types of osteochondritis Bones affected Kohler Navicular Keinbock Lunate Pehes Femur head Johanson- Larsens lower pole of patella REF : MAHESWARI 9TH ED', 'role': 'assistant'}]