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
Pharyngoconjunctival fever is caused by ? 
Select and explain. 
A. Adenovirus 3 and 7, B. Adenovirus 11, 21, C. Adenovirus 40, 41, D. Adenovirus 8, 19
A: Adenovirus 3 and 7
Answer: A: Adenovirus 3 and 7 
Explanation: 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.