This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hematology, Subject name: Pharmacology
[{'content': 'Erythropoietin is mainly produced in: \nSelect and explain. \nA. Liver, B. Kidney, C. Intestine, D. Bone', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Erythropoietin is produced in the kidney in response to hypoxia and anemia. It binds to erythropoietin receptors on red cell progenitors and stimulates red cell production. From medical pharmacology padmaja 4th edition Page no 332', 'role': 'assistant'}]