Pathology Obstruction to the flow of CSF at the aqueduct of Sylvius will most likely lead to enlargement of – A All of the ventricles B Only lateral ventricle C Only fourth ventricle D Both lateral and third ventricles 💡 Explanation Obstruction to the flow of CSF at the aqueduct of Sylvius will most likely lead to enlargement of - ✓ Correct Answer: D. Both lateral and third ventricles