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
[{'content': '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: \nSelect and explain. \nA. Organophospahte Poisoning, B. Dhatura Poisoning, C. Opioid Poisoning, D. Pontine hemorrhage', 'role': 'user'}, {'content': 'Answer: A \nExplanation: organophosphates are anticholinesterases so it reduces cholinesterase level.\nop compounds have muscurnic, nicotinic, and central actions so it causes lacrimation, salivation, tremors.', 'role': 'assistant'}]