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: Unknown
Median Atlanto-axial joint is which type of joint - 
Select and explain. 
A. Pivot, B. Hinge, C. Saddle, D. Ellipsoid
A: Pivot
Answer: A: Pivot 
Explanation: Ans. is 'a' i.e., Plane o There are two types of atlanto-axial joints, both of which are synovial joints - i) One median atlanto-axial joint - Pivot joint. ii) Two lateral atlanto-axial joints - Plane synovial joint (flat joint).