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
Epidemic conjunctivitis is repoed in a rural area. What is the most probable causative organism? 
Select and explain. 
A. Adenovirus, B. Herpes virus, C. EB virus, D. Papilloma virus
A: Adenovirus
Answer: A: Adenovirus 
Explanation: Adenovirus infection is often associated with pharyngitis, a follicular reaction and injection of the palpebral conjunctiva, and preauricular adenopathy (pharyngoconjunctival fever). Epidemics of adenoviral keratoconjunctivitis occur. Ref: Braverman R.S. (2012). Chapter 16. Eye. In W.W. Hay, Jr., M.J. Levin, R.R. Deterding, J.J. Ross, J.M. Sondheimer (Eds), CURRENT Diagnosis & Treatment: Pediatrics, 21e.