This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Following features differentiate hydranencephaly from hydrocephalus \nSelect and explain. \nA. Hydranencephaly is static whilst hydrocephalus continues to increase in size, B. Hydranencephaly does not increase in head size, C. Cerebral coex is deficient /hypoplastic in hydranencephaly, D. All of the above', 'role': 'user'}, {'content': "Answer: C \nExplanation: In hydranencephaly, cerebral hemispheres are absent or are represented by membranous sacs with remnants of frontal, temporal or occipital coex dispersed over the membrane while the midbrain and brainstem are relatively intact. Ref: Nelson's 20th edition, page 2817", 'role': 'assistant'}]