This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Radiology
[{'content': 'The following MRI head shows \nSelect and explain. \nA. Starry sky appearance, B. Soap bubble appearance, C. Dense MCA sign, D. Ring enhancing lesion', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. Soap bubble appearanceSoap bubble appearanceThe image shows MRI head with cluster of gelatinous pseudocysts with a soap bubble appearance (marked with arrow) at the periventricular white matter. This is seen in Cryptococcal meningitis.', 'role': 'assistant'}]