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: Surgery
[{'content': 'Guaiac slide test is used for \nSelect and explain. \nA. Fecal occult stool test, B. H. Pylori detection, C. Bile acids in stool, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]