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': 'Diethyltoluamide is an effective \nSelect and explain. \nA. Larvicidal, B. Agent againts pupae of anophales, C. Repellent, D. Space spray', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Diethyl toluimide /deetis an all purpose repellant.\nThey are used for application on skin, and their chief advantage is short duration of protection.Repellant are contact poisons. \nThey are used as peraonal protective measure against mosquito bite.\nOther neasure are using mosquito nets and screening. \nParks textbook of preventive and social medicine.K Park', 'role': 'assistant'}]