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': "Gissane's angle in intraarticular fracture of calcaneum - \nSelect and explain. \nA. Reduced, B. Increased, C. Not changed, D. Variable", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Bohler\'s (tuber-joint) angle is reduced in intra-articular calcaneal fractures (normal 24-40°).\nThe crucial angle of "Gissane" is increased in intra-articular clacaneum fractures (normal 100°).', 'role': 'assistant'}]