This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pediatrics
Most common cause of fatal ventriculomegaly is ? 
Select and explain. 
A. Arnold Chiari Malformation - I, B. Arnold Chiari Malformationalformation - II, C. Aqueductal Stenosis, D. Dandy Walker Malformation
C: Aqueductal Stenosis
Answer: C: Aqueductal Stenosis 
Explanation: Most common cause of hydrocephalus and ventriculomegaly is aqueductal stenosis. Ventricles develop early in pregnancy and can be seen on a a minor self-limiting imbalance in fluid circulation and absorption that becomes compensated defects in brain development damage or loss of brain tissue Reference: GHAI Essential pediatrics, 8th edition