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: Pediatrics
Most common viral cause of acquired aqueductal stenosis is ? 
Select and explain. 
A. Rubella, B. Mumps, C. Toxoplasma, D. Enterovirus
B: Mumps
Answer: B: Mumps 
Explanation: Out of the given options, only mumps and toxoplasma cause aqueductal stenosis. Toxoplasma is not a virus. Hence, the answer is mumps.