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': 'A most common complication of Colles \nSelect and explain. \nA. Malunion, B. Avascular necrosis, C. Finger stiffness, D. Rupture of EPL tendon', 'role': 'user'}, {'content': "Answer: C \nExplanation: The complication rate is 55%, with the most common complication being some degree of the residual finger and wrist stiffness (39%).\nA most common complication of Colle's fracture → Finger stiffness.\n2nd most common complication of Colle's fracture → Malunion.", 'role': 'assistant'}]