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
[{'content': 'Most common cause of fungal orbital cellulitis in diabetes \nSelect and explain. \nA. Aspergillus, B. Fusarium, C. Mucormycosis, D. Candida', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. (c) MucormycosisRef: Kanski 7/e, p. 91, Parson's 22/e, p. 242Mucormycosis often affects patients with diabetic ketoacidosis or immunosuppression.", 'role': 'assistant'}]