In blood, bilirubin is with: (A) Protein, (B) Steroid, (C) Vitamin, (D) Carbohydrates
Answer is A. Bilirubin formed by the destruction of RBCs is free or unconjugated bilirubin.It is lipid soluble and bound to albumin(protein conjugation),which prevents it's excretion by the kidneys in urine. Ref.Text book of physiology by AK Jain 7th edition page no.79