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
Form the normal bacterial flora of the conjunctiva 
Select and explain. 
A. Corynebacterium xerosis, B. E. Coli, C. Streptococci, D. All of the above
A: Corynebacterium xerosis
Answer: A: Corynebacterium xerosis 
Explanation: Ans. Corynebacterium xerosis