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
ATT drug causing contact lens stainig is 
Select and explain. 
A. INH, B. Rifamipicin, C. Streptomycin, D. Pyrazinamide
B: Rifamipicin
Answer: B: Rifamipicin 
Explanation: refer Goodman Gilman 12th/1553 Rifamipicin cause discolouration (orange) of secretions leading to control lens5 staining