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': 'Most common bacteria associated with conjunctivitis is \nSelect and explain. \nA. Staphylococcus aureus, B. Streptococcus pneumoniae, C. Haemophilus influenzae, D. Neisseria gonorrhoea', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Staphylococcus aureus', 'role': 'assistant'}]