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
Commonly used Rodenticide is - 
Select and explain. 
A. Zinc phosphide, B. Copper sulphate, C. Zinc oxide, D. Ferrous sulphate
A: Zinc phosphide
Answer: A: Zinc phosphide 
Explanation: Commonly used rodenticides: Barium carbonate Zinc phosphide Warfarin, diphacinone, coumafuryl, and pindone in multiple doses Park's Textbook of Preventive and Social Medicine, 25th Edition, Pg 847