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: Unknown
[{'content': 'In ankle sprain, the commonest ligament torn is? \nSelect and explain. \nA. Tibio-talar ligament, B. Deltoid ligament, C. Posterior talo-fibular ligament, D. Anterior talo-fibular ligament', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ankle sprain is an inversion injury and anterior talo-fibular ligament is first to be damaged. More severe injury can also damage origin of extensor digitorum brevis and calcaneo-fibular ligament.', 'role': 'assistant'}]