This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: mycology, Subject name: Microbiology
[{'content': "Orbital mucormycosis is a complication of \nSelect and explain. \nA. AIDS, B. Steroid therapy, C. Cushing's disease, D. Diabetic ketoacidosis", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Orbital mucormycosis is caused by Mucor and Rhizopus. The lesions are especially common in patients with diabetic ketoacidosis. Ref: Textbook of Microbiology, Ananthanarayan and Paniker; 9th edition', 'role': 'assistant'}]