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': 'Interstitial keratitis is seen in all except: \nSelect and explain. \nA. Syphilis, B. Acanthamoeba, C. Chlamydia trachomatis, D. HSV', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Acanthamoeba', 'role': 'assistant'}]