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: Radiology
[{'content': "Puff of smoke appearance in cerebral angiography is a feature of \nSelect and explain. \nA. Carotid artery thrombosis, B. Alexander disease, C. Moya moya disease, D. Krabbe's disease", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Lenticulostriate arteries form a rich collateral network around occlusive lesion - puff of smoke.\nAnterior circulation > posterior.', 'role': 'assistant'}]