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: Anatomy
Not a tributary of cavernous sinus: 
Select and explain. 
A. Superior petrosal sinus, B. Sphenoparietal sinus, C. Inferior ophthalmic vein, D. Superficial middle cerebral veins
A: Superior petrosal sinus
Answer: A: Superior petrosal sinus 
Explanation: Tributaries of cavernous sinusFrom the orbit:- Superior ophthalmic veins- Inferior ophthalmic vein or its branch- Central vein of the retinaFrom the brain:- Superficial middle cerebral vein- - Inferior cerebral veinsFrom the meninges:- Sphenoparietal sinus- Frontal trunk of the middle meningeal veinDraining channels:- Transverse sinus through the superior petrosal sinusInternal jugular vein through inferior petrosal sinus and through a plexus around the internal carotid aery- Into pterygoid plaexus of veins through the emissary veinsFacial vein through the superor ophthalmic vein