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
Secondary bile acids are synthesised by: 
Select and explain. 
A. Liver, B. Intestine, C. Both liver and intestine, D. Pancreas
B: Intestine
Answer: B: Intestine 
Explanation: Bile acids are synthesized in the liver. Bile acids are divided into primary or secondary: Primary bile acids are synthesized in the liver and secondary bile acids are synthesized from primary bile acids in the intestine by colonic bacteria. Ref: Harrison, E-18, P-2461.