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': 'Cobblestone appearance of the conjunctiva is typically seen with – \nSelect and explain. \nA. Phlyctenular conjunctivitis, B. Foreign body, C. Spring catarrh, D. Trachoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Cobble-stone or pavement stone appearance is seen in spring catarrh.', 'role': 'assistant'}]