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
What is the treatment of threshold ROP: 
Select and explain. 
A. Laser photocoagulation, B. Slow reduction in oxygen, C. Retinal reattachment, D. Antioxidants
A: Laser photocoagulation
Answer: A: Laser photocoagulation 
Explanation: A i.e. Laser photocoagulation