Commonest cause of obstructive hydrocephalus in children?

Commonest cause of obstructive hydrocephalus in children? mcq given below:

(a) Aqueductal stenosis
(b) Dandy Walker syndrome
(c) Subarachnoid hemorrhage
(d) Tubercular meningitis

Ans: (a) Aqueductal stenosis

Do you Agree with Answer comment below