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
Argon laser is used in all except: 
Select and explain. 
A. Retinal detachment, B. Retinitis pigmentosa, C. Retinal vein occlusion, D. Eales' disease
B: Retinitis pigmentosa
Answer: B: Retinitis pigmentosa 
Explanation: Ans. Retinitis pigmentosa