This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper Limb Traumatology, Subject name: Orthopaedics
[{'content': 'A person had an oblique fracture of olecranon which was displaced proximally. The treatment is: \nSelect and explain. \nA. Excision and resuturing, B. Tension band wiring, C. Elbow is immobilized by cast, D. Open reduction and external fixation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: - Fracture of the olecranon in adults, when the fragments are separated, open reduction and internal fixation are necessary by Tension Band Wiring. - Tension band wiring is also done in case of fracture of patella and medial malleolus.', 'role': 'assistant'}]