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': 'Not involved in the stability of ankle joint \nSelect and explain. \nA. Deltoid ligament, B. Spring ligament, C. Anterior Talofibular ligament, D. Posterior Talofibular ligament', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]