This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': '"Pile of plates" appearance on angiography suggests diagnosis of \nSelect and explain. \nA. Atherosclerosis, B. Fibromuscular Dysplasia, C. Takayasu\'s Disease, D. Moya Moya disease', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Angiography: "string of beads"/"Pile of plates" appearance of FMD is classically seen on angiography. Fibromuscular dysplasia most commonly causes small stenoses along a vessel with intervening areas of dilatation (small aneurysms), creating a "string of beads" appearance. Less commonly the stenosis has a smooth tapered appearance. Fibromuscular dysplasia also weakens the vessel wall which predisposes to dissection ref Robbins 9/e pg 678', 'role': 'assistant'}]