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: Psychiatry
[{'content': 'A patient on t/t for psychiatric disorder takes an overdose of a drug, develops bradycardia, hypotension, decreased sweating and salivation. The likely drug is - \nSelect and explain. \nA. Amitryptilline, B. Lithium, C. Selegiline, D. Amphetamine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: TCAs can cause postural hypotension → Amitriptyline has maximum propensity.\nDecreased sweating & salivation are due to anticholinergic side effects.', 'role': 'assistant'}]