This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Gynaecology & Obstetrics
[{'content': 'Which of the following is the biochemical marker of choice from cholestatic jaundice of pregnancy? \nSelect and explain. \nA. Serum Bilirubin, B. Bile acids, C. Bile salts, D. Alkaline phosphatase levels', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]