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: Medicine
[{'content': 'Whenever there is stone in the bile duct which of the following raises -a) Bile saltsb) Bilirubinc) Amylased) SGPT \nSelect and explain. \nA. ac, B. ab, C. ad, D. bc', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]