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
Mineral oils are used in mosquito control measure as a: 
Select and explain. 
A. Personal protection methods, B. Larvicide, C. A dulticide, D. Space spray
B: Larvicide
Answer: B: Larvicide 
Explanation: Larvicide