This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuroanatomy, Subject name: Anatomy
Angular vein infection causes thrombosis in: 
Select and explain. 
A. Cavernous sinus, B. Suprasaggital sinus, C. Transverse sinus, D. Inferior petrosal sinus
A: Cavernous sinus
Answer: A: Cavernous sinus 
Explanation: Ans. A Cavernous sinusRef: Gray's Anatomy, 40th ed. Ch; 29* The upper most segment of the facial vein, above its junction with the superior labial vein, is also called the angular vein.* Any infection of the mouth or face can spread via the angular veins to the cavernous sinuses resulting in thrombosis.