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': 'Thrombophlebitis extending from thigh to involve iliofemoral vein causes \nSelect and explain. \nA. Red leg, B. Blue leg, C. Purple leg, D. White leg', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Answer- D. White legWhite leg (Phlegmasia alba dolens)- seen in ileofemoral thrombophlebitis.Phlegmasia alba dolens (white leg): This is characterised by aerial spasm resulting in pale, cold leg with diminished pulses, with blanching of the limb, more often seen in iliofemoral thrombophlebitis and is called milk leg of pregnancy.', 'role': 'assistant'}]