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: Anaesthesia
[{'content': 'Most potent antiemitic agent used in preoperative period \nSelect and explain. \nA. Glycopyrolate, B. Hyoscine, C. Atropine, D. Metochlorpromide', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Metochlopromide Metochlopramide increases lower esophageal sphinter tone, speeds gastric emptying & lowers gastric fluid volume & decreases risk for aspiration pneumonia due to antiemetic effect', 'role': 'assistant'}]