This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
Percentage of bilirubin production from old RBCs 
Select and explain. 
A. 20%, B. 80%, C. 100%, D. 40%
B: 80%
Answer: B: 80% 
Explanation: (B) 80% > Bilirubin is the end product of heme degradation.> From 70 to 90% of bilirubin is derived from degradation of the hemoglobin of senescent red blood cells.> Bilirubin produced in the periphery is transported to the liver within the plasma, where, due to its insolubility in aqueous solutions, it is tightly bound to albumin.