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: Ophthalmology
[{'content': 'Drugs used in treatment of herpes simplex keratitis include all except: \nSelect and explain. \nA. Idoxuridine 0.1%, B. 5-Fluorouracil, C. Adenosine arabinoside, D. Pimarcin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. Pimarcin', 'role': 'assistant'}]