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: Social & Preventive Medicine
[{'content': 'Most sensitive test for sanguinarine is \nSelect and explain. \nA. Paper chromatography, B. FeC13, C. HCl, D. Nitric Acid', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]