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 type of joint is proximal radioulnar joint? 
Select and explain. 
A. Hinge joint, B. Ball and socket joint, C. Pivot joint, D. Saddle joint
C: Pivot joint
Answer: C: Pivot joint 
Explanation: Proximal radioulnar joint aiculates between the circumference of the head of the radius and the anular ligament and the radial notch on the ulna. It forms a synol pivot joint. Action is pronation and supination of the forearm. Distal radioulnar joint aiculated between the rounded head of the ulna and the ulnar notch on the radius. It is also forms synol pivot joint. Ref: Clinical Anatomy By Regions By Richard S. Snell, 2011, Page 408, 409.