This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuroradiology, Subject name: Radiology
[{'content': 'Boomerang ventricle is a feature of? \nSelect and explain. \nA. Lissencephaly, B. Schizencephaly, C. Holoprosencephaly, D. Huntingtons Chorea', 'role': 'user'}, {'content': 'Answer: C \nExplanation: *Pancake Brain and boomerang/horse shoe ventricle is presence of a single large ventricle in Prosencephalon feature of Alobar Holoprosencephaly Can be seen associated with Patau syndrome/Trisomy 13.', 'role': 'assistant'}]