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
Ultra low volume fogging is done for: 
Select and explain. 
A. DDT, B. Malathion, C. Pyrethroid, D. Abate
B: Malathion
Answer: B: Malathion 
Explanation: Ref: Park 'Textbook of Preventive and Social Medicine', 22nd' edition, Pg: 728 -9 A- NVBDCP website available from style="font-size: 1.04761904761905em; font-family: Times New Roman, Times, serif">.in/Doc dengue_ I20 Director_Desk:20 DGHS: 20 meeting; 20 OCT :2006.pdfExplanation:Under the public health programme, ULV spray (fogging) is undertaken by using 95% or pure technical malathion.As a low volume spray (ULV), Malathion has been widely used for killing adult mosquitoes to prevent or interrupt dengue-hemorrhagic fever and mosquito borne encephalitis epidemicsDDT is used as indoor residual spraying for control of malariaPyrethroids is used as space sprayAbate is used to control vector breading in domestic drinking water containers such as well