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
All are true about bilirubin , EXCEPT: 
Select and explain. 
A. Hydrophobic and toxic compound, B. It is a tetrapyrrole, C. Daily production is 4 mg/kg, D. Most hemoglobin is derived from ineffective erythropoiesis
D: Most hemoglobin is derived from ineffective erythropoiesis
Answer: D: Most hemoglobin is derived from ineffective erythropoiesis 
Explanation: 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