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: Ophthalmology
Simultaneous thrombosis of both the cavernous sinuses usually occurs in: 
Select and explain. 
A. Diseases of the sphenoid sinuses, B. Septic wounds of the face, C. Pyogenic meningitis, D. Patients with cerebral abscess
A: Diseases of the sphenoid sinuses
Answer: A: Diseases of the sphenoid sinuses 
Explanation: Ans. Diseases of the sphenoid sinuses