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: Pathology
[{'content': 'Corticosteroids are contraindicated in all of the following except: \nSelect and explain. \nA. Herpes zoster., B. Varicella., C. Pemphigus., D. Herpes simplex.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]