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: Unknown
[{'content': 'Hydrocephalous is detailed best antenately by - \nSelect and explain. \nA. X-ray abdomen, B. Amniocentasis, C. Clinical examination, D. Ultrasonography', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans-DUltrasound (Ref Williams Obstetrics, 21st,p. 1119-1120).The best method for the diagnosis of hydrocephalus prenatally is ultrasound.On ultrasound, the excess fluid is reflected by ventriculomegaly.', 'role': 'assistant'}]