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: Medicine
Which of the following systems is used for classification of Diabetic foot gangrene: 
Select and explain. 
A. Texas classification, B. Rutherford Classification, C. Fontaine Classification, D. All of the above
A: Texas classification
Answer: A: Texas classification 
Explanation: Answer is A (Texas Classification): University of Texas classification of diabetic foot wounds and Wagner's classification for foot ulcers (MeggittWagner classification) are the two most commonly used classification systems for diabetic foot ulcers. The Rutherford classification and The Fontaine classification are commonly used clinical staging system for describing peripheral aerial disease. Peripheral aerial disease are typically described in Fontaine's stages and Rutherford's categories.