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': 'Pseudomembranous conjunctivitis is caused by: \nSelect and explain. \nA. Gonococcus, B. Staphylococcus, C. Streptococcus, D. Keratoconjunctivitis sicca', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Streptococcus', 'role': 'assistant'}]