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: Orthopaedics
[{'content': "Bohler's angle is decreased in fracture of - \nSelect and explain. \nA. Calcaneum, B. Talus, C. Navicular, D. Cuboid", 'role': 'user'}, {'content': "Answer: A \nExplanation: Bohler's Tuber Joint Angle and Crucial Angle of Gissane are measured for Intra Articular Fractures of Calcaneum.", 'role': 'assistant'}]