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: Surgery
Painless effusions in joints in congenital syphilis is called 
Select and explain. 
A. Clutton' s joints, B. Banton's joints, C. Charcot's joints, D. Synovitis
A: Clutton' s joints
Answer: A: Clutton' s joints 
Explanation: None