This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Physiology
[{'content': 'All are components of bile, except \nSelect and explain. \nA. Bile salts, B. Bile pigment, C. Stercobilinogen, D. Bilirubin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Stercobilinogen is a chemical created by bacteria in the gut. It is made of broken-down hemoglobin. It is fuher processed to become the chemical that gives feces its brown color while all other things are components of bile Ref: guyton and hall textbook of medical physiology 12 edition page number:420,421,422', 'role': 'assistant'}]