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
Chronically lymphoedematous limb ispredisposed to all of the following except - 
Select and explain. 
A. Thickening of the skin, B. Recurrent soft tissue infections, C. Marjolin's ulcer, D. Sarcoma
C: Marjolin's ulcer
Answer: C: Marjolin's ulcer 
Explanation: None