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
[{'content': 'Normal conjunctival flora is \nSelect and explain. \nA. E. coli, B. Pseudomonas, C. Coagulase negative staphylococci, D. Lactobacillus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer- C. Coagulase negative staphylococciResident flora-Coagulase negative staphylococci (most common)MicrococciHaemphillusCorneybacterium xerosis', 'role': 'assistant'}]