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: Biochemistry
[{'content': 'Bile acids synthesized in the liver (Primary bile acids) - \nSelect and explain. \nA. Cholic acid, B. Chenodeoxycholic acid, C. Taurocholic acid, D. All of these', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Primary bile acids are cholic acid and chenodeoxycholic acid. These are conjugated with glycine and taurine to form glycocholic acid, glycochenodeoxycholic acid, taurocholic acid,\xa0and taurochenodeoxycholic acid.\nSecondary bile acids are deoxycholic acid and lithocholic acids.', 'role': 'assistant'}]