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': 'Which of the following insecticides is a natural Which of the product ? \nSelect and explain. \nA. Dieldrin, B. Pyrethrum, C. Parathion, D. Carbaryl', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Pyrethrum", 'role': 'assistant'}]