Unknown Which of the following most likely causes a com¬municating (nonobstructive) hydrocephalus? A Tuberculous meningitis B Stenosis of the duct of Sylvius C Ependymoma of the fourth ventricle D Blockage of the arachnoid granulations 💡 Explanation Which of the following most likely causes a com¬municating (nonobstructive) hydrocephalus? ✓ Correct Answer: D. Blockage of the arachnoid granulations