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: Anatomy
[{'content': 'The stability of the ankle joint is maintained by the following, except \nSelect and explain. \nA. Plantar calcaneonavicular (spring) ligament, B. Deltoid ligament, C. Lateral ligament, D. Shape of the superior talar aicular surface', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A. i.e. Planter calcaneonavicular ligament Calcaneonavicular/ Spring ligament is most impoant ligament for maintaining the median longitudinal arch of foot but has nothing to do with stability of ankle joint because it is not around ankle joint', 'role': 'assistant'}]