This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitreous and retina, Subject name: Ophthalmology
A 32-year-old female is on long-term treatment for Rheumatoid ahritis. Fundus examination was done on follow up visit. What is the most probable drug responsible for this? 
Select and explain. 
A. Leflunomide, B. Chloroquine, C. Ibuprofen, D. Methotrexate
B: Chloroquine
Answer: B: Chloroquine 
Explanation: It is a typical picture of Bull&;s eye maculopathy. Seen in chloroquine drug toxicity.AdultsChildrenProgressive cone dystrophyBardet-Biedl syndromeAdvanced Stargardt diseaseHallervorden-Spatz syndromeFenestrated sheen macular dystrophyLeber congenital amaurosisBenign concentric annular macular dystrophyLipofuscinosisClofazimine retinopathyAD cerebellar ataxia