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': 'Mineral oils are used in mosquito control measure as a: \nSelect and explain. \nA. Personal protection methods, B. Larvicide, C. A dulticide, D. Space spray', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Larvicide', 'role': 'assistant'}]