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
The normal brown red colour of feces results from the presence of 
Select and explain. 
A. Heme, B. Stercobilin, C. Biliverdin, D. Bilirubin diglucuronide
B: Stercobilin
Answer: B: Stercobilin 
Explanation: None