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
Which is not a fibrous joint: 
Select and explain. 
A. Gomphoses, B. Cranial sutures, C. First costochondral joint, D. Inferior tibiofibular joint
C: First costochondral joint
Answer: C: First costochondral joint 
Explanation: First costochondral joint is a hyaline cailage joint (synchondrosis or syscendrosis), which is a type of primary cailagenous joint. Sutures of skull, Inferior tibifibular joint (syndesmosis), denotalveolar joint (gomphosis) are examples of fibrous joint.