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 fusion of two bony structures with a ligament is known as \nSelect and explain. \nA. Synostosis, B. Synchondrosis, C. Diarthrosis, D. Syndesmosis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]