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
[{'content': 'Most specific test for organophosphorous poisoning is: \nSelect and explain. \nA. RBC cholinesterase level, B. Plasma cholinestrase level, C. RBC uroporphyrin level, D. Measurment of serum level of organophosphorous', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Plasma cholinesterase level', 'role': 'assistant'}]