This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nose and paranasal sinuses, Subject name: ENT
Veins not involved in spreading infection to cavernous sinus from danger area of face: 
Select and explain. 
A. Lingual vein, B. Pterygoid plexus, C. Facial vein, D. Cephalic vein
D: Cephalic vein
Answer: D: Cephalic vein 
Explanation: A. Lingual vein and D.Cephalic vein Dangerous area of face includes upper lip and anteroinferior pa of nose including the vestibule.This area freely communicates with the cavernous sinus through a set of valveless veins,anterior facial vein and superior ophthalmic vein. Any infection of this area can this travel intracranially leading to meningitis and cavernous sinus thrombosis. Ref.Maqbool 11/e,p 172.