This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharmacokinetics, Subject name: Pharmacology
[{'content': 'Drug, NOT metabolised by liver is : \nSelect and explain. \nA. Penicillin G, B. Phenytoin, C. Erythromycin, D. Cimetidine', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' Penicillin G Penicillin G is metalized mainly in kidneyApproximately 10% of the drug is eliminated by glomerular filtration and 90% by tubular secretionRest of the drugs given in the question erythromycin, cimetidine and phenytoin are metabolized in the liver.", 'role': 'assistant'}]