This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Aerial disorders, Subject name: Surgery
[{'content': 'Fontaine and Rutherford classification of peripheral aerial disease is based on: \nSelect and explain. \nA. Clinical, B. Aerial stenosis on imaging, C. Both clinical and aerial stenosis on imaging, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Fontaine or Rutherford classification system of peripheral aerial disease Fontaine classification Rutherford classification Stage Clinical Grade Category Clinical I Asymptomatic 0 0 Asymptomatic IIa Mild claudication I 1 Mild claudication IIb Moderate to severe I 2 Moderate claudication Claudication I 3 Severe claudication III Ischemic rest pain II 4 Ischemic rest pain IV Ulceration or gangrene III 5 Minor tissue loss III 5 Major tissue loss', 'role': 'assistant'}]