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
[{'content': 'Which drug is excreted unchanged in urine ? \nSelect and explain. \nA. Verapamil, B. Furosemide, C. Propranolol, D. Thiopentone', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Furosemide Furosemide pharmacokinetics Furosemide is rapidly absorbed orally but bioavailability is about 60%. Lipid solubility is low and it is highly bound to plasma proteins. It is pay conjugated by glucuronic acid and is mainly excreted unchanged by glomerular filtration and tubular secretion.", 'role': 'assistant'}]