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
Recommended Larvicides for control of Malaria includes all of the following except - 
Select and explain. 
A. Abate, B. Pyrethrium, C. Fenthian, D. Copper Acetoarsenite
B: Pyrethrium
Answer: B: Pyrethrium 
Explanation: Pyrethrum extracts are space spray which comes under anti-adult measures. Abate and fenthion are synthetic anti-larval insecticides. Paris green (Copper acetoarsenite) is used as chemical control of larvae. Park's Textbook of Preventive and Social Medicine, 25th Edition, Pg 833