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
After extraction of upper central incisor, patient develops ophthalmoplegia, meningitis and lateral rectus paralysis. The diagnosis is 
Select and explain. 
A. Cavernous sinus thrombosis, B. Not related, C. Cellulitis, D. Ludwig's angina
A: Cavernous sinus thrombosis
Answer: A: Cavernous sinus thrombosis 
Explanation: None