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: Microbiology
[{'content': 'Pharyngoconjunctival fever is caused by ? \nSelect and explain. \nA. Adenovirus 3 and 7, B. Adenovirus 11, 21, C. Adenovirus 40, 41, D. Adenovirus 8, 19', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Adenovirus 3 and 7 Pharyngo-conjunctival fever is caused most commonly by serotypes 3 and 7, but serotypes 2, 4 and 14 also have been documented as etiologic agents.", 'role': 'assistant'}]