This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diabetes Mellitus, Subject name: Medicine
MC joint involved in diabetes is? 
Select and explain. 
A. Ankle, B. Knee, C. Shoulder, D. Foot
D: Foot
Answer: D: Foot 
Explanation: Most common joint involved in diabetes is Foot Joint Charcot's joint - Painless, Paralyzed joint Neuropathy Delayed wound repair Angiopathy Non-heading ulcar on soul of test Ankle Joint - in tables dorsalis Knee - OA Shoulder- Syringomyelia - Dilation of central canal of Spinal cord. MC Cervical spine involved