Which of the following is correct about breakdown of hemoglobin (Hb)_____________?
  
  
		A.	Hb→Heme→bilirubin→Urobilinogen
B.	Heme→Hb→Biliverdin→Urobilinogen
C.	Hb→Heme→Bilverdin→Uro bilinogen
D.	Hb→Heme→bilirubin→Urobilinogen→Biliverdin
