This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mood Disorders, Subject name: Psychiatry
[{'content': 'Which of the following drug when combined with Electro-convulsive therapy leads to post ictal delirium \nSelect and explain. \nA. Succinylcholine, B. Lithium, C. Desipramine, D. Clozapine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Lithium when combined with ECT Lowered seizure threshold - Prolonged seizures(lasting > 3 min). Results in post-ictal delirium. Doses are withheld for 24 hours prior to treatment', 'role': 'assistant'}]