Physiology Nervous System f3920a67 CSF is formed by - A Arachnoid villi B Venous plexus C Choroid plexus D Subfornical nucleus High-Yield Explanation Ans. (c) Choroid plexus(Ref: Ganong, 25th ed/p.603)CSF is produced from choroid plexuses epithelial cells. It is absorbed through the arachnoid villi into veins