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': 'Clearance - \nSelect and explain. \nA. Refers to the efficacy of elimination of a drug by an organ or whole body, B. Cannot be greater than blood flow to an organ, C. Determines the steady of the drug concentration, D. All the above', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., All of the above Clearance of a drug is the theoretical volume of plasma from which the drug is completely removed in unit time.", 'role': 'assistant'}]