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': 'What is the treatment of threshold ROP: \nSelect and explain. \nA. Laser photocoagulation, B. Slow reduction in oxygen, C. Retinal reattachment, D. Antioxidants', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Laser photocoagulation', 'role': 'assistant'}]