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
Angular vein infection commonly causes thrombosis of: 
Select and explain. 
A. Cavernous sinus, B. Sphenoid sinus, C. Petrosal sinus, D. Sigmoid sinus
A: Cavernous sinus
Answer: A: Cavernous sinus 
Explanation: Ref : Dhingra 7e pg 226.