This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
[{'content': 'Which of the following is a natural contact poison - \nSelect and explain. \nA. Malathione, B. Paris green, C. Pyrethrum, D. Abate', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Insecticides are used to kill insects.They are contact poisons,stomach poisons and fumigants. The contact poisons are both natural and synthetic The natural contact poisons are pyrethrum,rotenone,,derris,nicotine,mineral oils. Synthetic contact poisons are DDT,BHC,lindane,chlordane. Parks textbook of preventive and social medicine.K Park. Edition 23.Pg no: 783.', 'role': 'assistant'}]