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: Forensic Medicine
Estimation of plasma cholinesterase levels may be helpful in the management of poisoning with: UPSC 07 
Select and explain. 
A. Dhatura, B. Barbiturate, C. Organophosphorus, D. Opium
C: Organophosphorus
Answer: C: Organophosphorus 
Explanation: Ans. Organophosphorus