This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'ATT drug causing contact lens stainig is \nSelect and explain. \nA. INH, B. Rifamipicin, C. Streptomycin, D. Pyrazinamide', 'role': 'user'}, {'content': 'Answer: B \nExplanation: refer Goodman Gilman 12th/1553 Rifamipicin cause discolouration (orange) of secretions leading to control lens5 staining', 'role': 'assistant'}]