<prompt> Which of the following drug is commonly used in narcoanalysis?Atropine sulfateScopolamine hydrochloridePhenobarbitoneMorphine  <response>: Ans. B Scopolamine hydrochlorideRef: J Psychiatry and Law 1993:3:447-471Controlled administration of intravenous hypnotics to obtain information from subjects who are unable or unwilling to provide it otherwise, is known as Narcoanalysis or Narcosynthesis.Drugs used for narcoanalysis are:?Ethanol?Scopolamine?Temazepam?Barbiturates like Thiopentone and AmobarbitalThese drugs are also known as truth drug or truth serum.Phenobarbitone is not used, rather amobarbital is used for narcoanalysis. 