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
The first costochondral joint is a - 
Select and explain. 
A. Fibrous joint, B. Synovial joint, C. Syndesmosis, D. Synchondrosis
D: Synchondrosis
Answer: D: Synchondrosis 
Explanation: Costochondral junctions are primary cartilaginous joint (synchondrosis).