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 test is used for - \nSelect and explain. \nA. Pentosuria, B. Fructosuria, C. For occult blood in stool, D. Pancreatitis', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., For occult blood in stool", 'role': 'assistant'}]