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': 'Drug X is normally administered to patients at a rate of 50 mg/hour. Elimination of the drug X from body takes place as:\n– Hepatic Metabolism 10%\n– Biliary Secretion 10%\n– Renal Excretion 80%\nThis drug has to be administered to a 65 years old patient Uttaam Singh, with a GFR of 60 ml/min. (assuming normal GFR is 120ml/min). Liver and biliary functions are normal in this patient. What should be the dose rate of drug X in this patient? \nSelect and explain. \nA. 50 mg/hour, B. 30 mg/hr, C. 25 mg/hr, D. 100 mg/hr', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]