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': "Herbert\\'s pits are seen in – \nSelect and explain. \nA. Trachoma, B. Spring catarrh, C. Phlyctenular conjunctivitis, D. Sarcoidosis", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Herbert pits are the oval or circular pitted scar, left after healing of herbert follicles in the limbal area.', 'role': 'assistant'}]