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: Orthopaedics
Clutton's joint are 
Select and explain. 
A. Syphilitic joints, B. End stage Tuberculous joints, C. Associated with trauma, D. Usually painful
A: Syphilitic joints
Answer: A: Syphilitic joints 
Explanation: None