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: Biochemistry
End product of porphyrin metabolism ? 
Select and explain. 
A. Albumin, B. CO2 & NH2, C. Bilirubin, D. None
C: Bilirubin
Answer: C: Bilirubin 
Explanation: Ans. is 'c' i.e., Bilirubin Heme is the most impoant porphyrin. It is degraded into bilirubin.