This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Retina, Subject name: Ophthalmology
[{'content': 'Bulls eye retinopathy is seen in toxicity of: \nSelect and explain. \nA. Quinine, B. Tobacco, C. Ethanol, D. Chloroquine', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ref: Parson's 21st edition Diseases of the Eye page no:358Kanski: Clinical Ophthalmology; 7th edition, pg no 864Explanation:Chloroquine is a melanotropic drugIt is excreted very slowly from the body & get accumulated in melanin containing structures like RPE & choroidHydroxychloroquine - Less toxicMaximum dosage - Chloroquine - 6mg/kg/dayHydroxychloroquine - 4.5mg/kg/dayOther ocular side effects:vortex keratopathy - reversibleAnterior capsular cataract,Optic neuropathyOther causes of Bull's Eye MaeulopathyCone dystrophyCone rod dystrophyInverse retinitis pigmentosaStargardt 's disease", 'role': 'assistant'}]