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: Physiology
[{'content': 'The normal brown red colour of feces results from the presence of \nSelect and explain. \nA. Heme, B. Stercobilin, C. Biliverdin, D. Bilirubin diglucuronide', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]