This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood Vessels, Subject name: Pathology
[{'content': 'Berger disease does not involve \nSelect and explain. \nA. Artery, B. Veins, C. Nerve, D. Lymphatics', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. (d) Lymphatics(Ref: Robbins 9th/pg 512; 8th/pg 517)Buerger's disease: Segmental, thrombosing, acute and chronic inflammation of medium-sized and small arteries, principally the tibial and radial arteries, with occasional secondary extension into the veins and nerves of the extremities", 'role': 'assistant'}]