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: ENT
All of the following are diagnostic criteria of Allergic Fungal Sinusitis (AFS), EXCEPT: 
Select and explain. 
A. Areas of High Attenuation on CT scan, B. Orbital invasion, C. Allergic Eosinophilic mucin, D. Type I Hypersensitivity
B: Orbital invasion
Answer: B: Orbital invasion 
Explanation: The diagnostic criteria for allergic fungal sinusitis (AFS) are the presence of characteristic allergic mucin, type I hypersensitivity (eosinophilic-lymphocytic inflammation), absence of fungal invasion, immuno-compromised individuals and radiological confirmation (areas of high attenuation on CT scan).