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
[{'content': 'Features of acute ischemia of limb are all EXCEPT: \nSelect and explain. \nA. Perishing cold, B. Cyanosis, C. Paralysis, D. Paralysis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Cyanosis REF: Sabiston 18th edition chapter 66 The classic presentation of patients with acute ischemia of the extremities may be recalled by the "five P\'s": Pain, Pallor, Pulselessness, Paresthesias, and Paralysis. A sudden and complete embolic occlusion may result in a cool, waxy-appearing white extremity with no signs of cutaneous blood flow.', 'role': 'assistant'}]