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': 'Incubation period of gonococcal ophthalmia neonatorum is: \nSelect and explain. \nA. 24 hours, B. 5-7 days, C. 7-10 days, D. None of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. None of the above', 'role': 'assistant'}]