This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Conjunctiva, Subject name: Ophthalmology
[{'content': 'Cobblestone appearance is seen in \nSelect and explain. \nA. Spring Catarrh, B. Viral conjunctivitis, C. Bacterial conjunctivitis, D. Phlyctenular conjunctivitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Cobblestone appearance is severe papillary hyperplasia in upper palpebral conjunctiva Refer: Khurana 6th edition page number 73', 'role': 'assistant'}]