This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy, Subject name: Pharmacology
Bulls eye retinopathy is seen in 
Select and explain. 
A. Chloroquine, B. Methanol, C. Ethambutol, D. Steroids
A: Chloroquine
Answer: A: Chloroquine 
Explanation: Refer Kanski clinical ophthalmology 6/e p842-843 Chloroquine can cause Bulls eye retinopathy. The risk of retinotoxicity increases significantly with cumulative dose of more than 300 g.it is rare if duration is less than than one year