This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
[{'content': 'All are true about DVT EXCEPT \nSelect and explain. \nA. More common is lower limb, B. Leads to pulmonary embolism, C. Most important sign is colour change of limb, D. Main symptom is aching pain', 'role': 'user'}, {'content': "Answer: C \nExplanation: (C) Most important sign is colour change of limb # DVT: The thrombus may commence in a venous tributary of a main vein.> The calf is the most frequent site of thrombosis.> From here thrombus extends in a serpentine fashion into the main deep veins, where a portion may break off to cause pulmonary embolus.> The three most important signs which may be present in a case of deep vein thrombosis are swelling, tenderness & Homans' sign.", 'role': 'assistant'}]