This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Intravenous Anesthetic Agents, Subject name: Anaesthesia
[{'content': 'Which of the following drug is most effective in preventing emergence delirium with ketamine: \nSelect and explain. \nA. Atropine, B. Droperidol, C. Thiopentone, D. Midazolam', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Benzodiazepine have proved the most effective in preventing emergence delirium with ketamine midazolam is drug of choice. Concomitant intravenous propofol and thiopentone decreases incidence of emergence delirium seen with propofol. Previous intravenous glycopyrolate increases the incidence of emergence delerium.', 'role': 'assistant'}]