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: Pharmacology
A patient presents to emergency with a pinpoint pupil, salivation lacrimation, tremors and red tears. Plasma cholinesterase level Was 30% of normal. Most probable Diagnosis is: 
Select and explain. 
A. Organophospahte Poisoning, B. Dhatura Poisoning, C. Opioid Poisoning, D. Pontine hemorrhage
A: Organophospahte Poisoning
Answer: A: Organophospahte Poisoning 
Explanation: organophosphates are anticholinesterases so it reduces cholinesterase level.
op compounds have muscurnic, nicotinic, and central actions so it causes lacrimation, salivation, tremors.