This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
Sphenopareital sinus drains into? 
Select and explain. 
A. Saggital sinus, B. Transverse sinus, C. Cavernous sinus, D. Internal juglar vein
C: Cavernous sinus
Answer: C: Cavernous sinus 
Explanation: Sphenoparietal sinus and the frontal trunk of the middle meningeal vein may drain either into the pterygoid plexus through the foramen ovale or into the sphenoparietal or cavernous sinus. Ref: BD Chaurasia's HUMAN ANATOMY, Volume 3, 4th edition.