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
Hydrocephalous is detailed best antenately by - 
Select and explain. 
A. X-ray abdomen, B. Amniocentasis, C. Clinical examination, D. Ultrasonography
D: Ultrasonography
Answer: D: Ultrasonography 
Explanation: 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.