This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Arthritis, Subject name: Orthopaedics
Bouchard's nodes are seen in - 
Select and explain. 
A. Proximal IP joints, B. Distal IP joints, C. Stemo-clavicular joints, D. Knee joint
A: Proximal IP joints
Answer: A: Proximal IP joints 
Explanation: Ans. is 'a' i.e., Proximal IP joints In osteoarthritis of hand : Distal interphalangeal joint - Heberden's node Proximal interphalangeal joint - Bouchard's node