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': 'Transverse fracture of medial malleolus is due to \nSelect and explain. \nA. Adduction, B. Abduction, C. Inversion, D. Flexion', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]