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: Radiology
The first sign of hydrocephalus in children is – 
Select and explain. 
A. Post clinoid erosion, B. Large head, C. Sutural diastasis, D. Thinned out vault
C: Sutural diastasis
Answer: C: Sutural diastasis 
Explanation: In newborns and infants with hydrocephalus, soon after birth an examination of the anterior fontanelle will reveal a widened fontanelle and sutural diastasis.