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: Surgery
[{'content': 'The mechanism of injury of transverse fracture of medial malleolus results due to \nSelect and explain. \nA. Abduction injury, B. Adduction injury, C. Rotation injury, D. Direct injury', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Abduction Transverse fracture of medial malleolus occurs in pronation - abduction injuryQ i.e. the position of foot at the time of injury is pronated and the direction of force upon talus is - towards abduction. If malleolus is pushed off it usually fractures obliquely; if it is pulled off, it fractures transversely. - So in adduction (supination) injury : transverse avulsion fracture of fibula and veical (oblique) fracture of medial malleolus occurs. In abduction (pronation) injury : transverse fracture of medial malleolusQ and oblique fracture of fibula occure. In adduction injury the foot is supinated so k/a supination - adduction injury; and in abduction injury the foot is pronated so k/a pronation abduction injury.', 'role': 'assistant'}]