This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vascular surgery, Subject name: Surgery
[{'content': 'Which of the following is not a feature of peripheral aerial occlusion \nSelect and explain. \nA. Shock, B. Pain, C. Pallor, D. Parasthesia', 'role': 'user'}, {'content': "Answer: A \nExplanation: Symptoms and signs of peripheral aerial occlusion are classically remembered by 5 Ps. Pain Pallor Pulselessness Paralysis & Paraesthesia (actually it is anaesthesia, complete loss of sensation) Some add a sixth 'P' - 'poikilothermia' or 'perishing cold' MC presenting symptom of acute aerial occlusion - Pain (Schwaz Pretest) Ref : Bailey & Love 25/e p909", 'role': 'assistant'}]