This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abnormalities of Head Size, Subject name: Pediatrics
[{'content': 'What is the diagnosis in this infant with a large head? \nSelect and explain. \nA. Anencephaly, B. Hydranencephaly, C. Hydrocephalus, D. Hydrops fetalis', 'role': 'user'}, {'content': "Answer: B \nExplanation: The given image shows absence of cerebral hemispheres, which are replaced with fluid filled sacs. This condition is known as 'Hydranencephaly' -Hydrocephalus:- condition in which an accumulation of cerebrospinal fluid (CSF) occurs within the brain. -Anencephaly:- Absence of a major poion of the brain, skull, and scalp.", 'role': 'assistant'}]