This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Orbit, Subject name: Ophthalmology
Most common cause of fungal orbital cellulitis in diabetes 
Select and explain. 
A. Aspergillus, B. Fusarium, C. Mucormycosis, D. Candida
C: Mucormycosis
Answer: C: Mucormycosis 
Explanation: Ans. (c) MucormycosisRef: Kanski 7/e, p. 91, Parson's 22/e, p. 242Mucormycosis often affects patients with diabetic ketoacidosis or immunosuppression.