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: Surgery
Cavernous sinus thrombosis following infection of anterior maxillary teeth most often from spread of infection along 
Select and explain. 
A. Facial artery, B. Angular artery, C. Ophthalmic vein, D. Pterygoid plexus
C: Ophthalmic vein
Answer: C: Ophthalmic vein 
Explanation: None