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': 'Secondary bile acids are synthesised by: \nSelect and explain. \nA. Liver, B. Intestine, C. Both liver and intestine, D. Pancreas', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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.', 'role': 'assistant'}]