This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S., Subject name: Medicine
[{'content': "Lisker's sign is seen in? \nSelect and explain. \nA. DVT, B. Berger's disease, C. Coarctation of aorta, D. AV fistula", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. A. DVTLisker's sign is tenderness when the front, middle (anterior medial) part of the tibia is tapped (percussion). It is often present in people who have blood clots in their legs (deep venous thrombosis).", 'role': 'assistant'}]