This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Seedatives & Hyponotics, Subject name: Pharmacology
[{'content': 'Drug used in Narcoanalysis is: \nSelect and explain. \nA. Cocaine, B. Pethidine, C. Atropine, D. Scopalamine', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ref: Essentials of Medical Pharmacology by K.D. Tripat hi p. 109, 113.Explanation:Hyoscine (Scopalamine)Atropine substitute and quartemary ammonium compoundLess potent and longer acting than atropineUsed for esophageal and gastrointestinal spastic conditions.- Hyoscine has been used to produce sedation and amnesia during labour (twilight sleep) and to control maniacal states.- It had earned a reputation as a lie detector' during world war SI: its amnesic and depressant action was believed to put the subject 'off guard' in the face of sustained interrogation and sleep deprivation, so that he came out with the truth.", 'role': 'assistant'}]