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 of the following is a synovial joint of the condylar variety - 
Select and explain. 
A. First carpometacarpal joint, B. Metacarpophalangeal joint, C. Interphalangeal joint, D. Radiocarpal joint
B: Metacarpophalangeal joint
Answer: B: Metacarpophalangeal joint 
Explanation: Metacarpophalangeal joints are ellipsoid joints functionally, but structurally they belong to condylar joints.