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 detection of argemone oil – \nSelect and explain. \nA. Nitric acid test, B. Paper chromatography, C. Phosphatase test, D. Methylene blue test', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Paper chromatography is the most sensitive test.', 'role': 'assistant'}]