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 first costochondral joint is a - \nSelect and explain. \nA. Fibrous joint, B. Synovial joint, C. Syndesmosis, D. Synchondrosis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Costochondral junctions are primary cartilaginous joint (synchondrosis).', 'role': 'assistant'}]