This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
The drugs which achieve concentration in bile are all except ? 
Select and explain. 
A. Erythromycin, B. Tetracycline, C. Oral contraceptives, D. Alpha methyl dopa
D: Alpha methyl dopa
Answer: D: Alpha methyl dopa 
Explanation: Ans. is 'd' i.e., Alpha methyl dopa