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
Retinitis Pigmentosa is associated with all except: 
Select and explain. 
A. Usher Syndrome, B. Marfan's Syndrome, C. Kearns- Sayre Syndrome, D. Bassen - Kornzweig Syndrome
B: Marfan's Syndrome
Answer: B: Marfan's Syndrome 
Explanation: B i.e. Marfan syndrome