This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Inflammations of Conjunctiva - Infective, Subject name: Ophthalmology
[{'content': "Herberts pits are seen in: \nSelect and explain. \nA. Herpes keratitis, B. Fuch's dystrophy, C. Diabetes mellitus, D. Trachoma", 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e. Trachoma Herbert's pits are highly pathognomic of trachoma.They are found at the limbus*", 'role': 'assistant'}]