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: Medicine
[{'content': 'All are true about bilirubin , EXCEPT: \nSelect and explain. \nA. Hydrophobic and toxic compound, B. It is a tetrapyrrole, C. Daily production is 4 mg/kg, D. Most hemoglobin is derived from ineffective erythropoiesis', 'role': 'user'}, {'content': "Answer: D \nExplanation: Bilirubin Hydrophobic and potentially toxic compound It is tetrapyrrole and an end product of heme degradation. Daily production is 4 mg/kg of bilirubin . Most bilirubin (70% to 80%) is derived from degradation of hemoglobin Minor component arises from ineffective erythropoiesis Ref:Sleisenger and Fordtran's,E-9,P-323", 'role': 'assistant'}]