Pediatrics Central Nervous system ff4fa443 Commonest cause of obstructive hydrocephalus in children A Acqueductal stenosis B Aquaductal gliosis C Subarachnoid hemorrhage D Tubercular meningitis High-Yield Explanation Aqueducts stenosis is most common cause of obstructive hydrocephalus in children. Reference: GHAI Essential pediatrics, 8th edition