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: Unknown
[{'content': 'A person presents to OPD with tremors, visual hallucinations after 2 days history of alcohol cessation.  Diagnosis is: \nSelect and explain. \nA. Korsakoff’s psychosis, B. Delirium tremens, C. Wernicke encephalopathy, D. Alcoholic hallucinosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref. Oxford textbook of Psychiatry. Page. 572\n\xa0\n\xa0Delirium Tremens / Alcohol Withdrawal Delirium (AWD):\nMost severe form of ethanol withdrawal manifested by,\nMechanism: \n\nAltered mental status (Global confusion)\nAutonomic hyperactivity (Sympathetic overdrive)\n\nAlcohol abuse affects neurotransmitter systems in brain mainly by,\n\nLoss of GABA inhibitory mechanism - Reduces chloride ion influx.\nAlcohol acts as NMDA receptor antagonist - Withdrawal increases the excitatory neurotransmitter.\n\nThe clinical manifestations of ethanol withdrawal are combination effects of GABA & NMDA receptor activity.\nThus causing tremors, diaphoresis, tachycardia, anxiety & in severe cases Seizure.', 'role': 'assistant'}]