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': 'All of the following viruses involve eye except \nSelect and explain. \nA. Herpes zoster, B. Herpes simplex, C. Echo, D. Adenovirus -8', 'role': 'user'}, {'content': 'Answer: C \nExplanation: All the options are correct but since the least common is echovirus will be marked as the answer', 'role': 'assistant'}]