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
Heberden's Arthropathy affects - 
Select and explain. 
A. Lumbar spine, B. Symmetrically large joints, C. Sacroiliac joints, D. Distal interphalangeal joints
D: Distal interphalangeal joints
Answer: D: Distal interphalangeal joints 
Explanation: In osteoarthritis of hand :

i)   Distal interphalangeal joint :- Heberden's node.
ii)  Proximal interphalangeal joint :- Bouchard's node