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
All except one are deformities associated with Leprosy 
Select and explain. 
A. Claw hand, B. Lag ophthalmos, C. Clutton's joint, D. Foot drop
C: Clutton's joint
Answer: C: Clutton's joint 
Explanation: Clutton's joints are associated with syphilis.