<prompt> Which of the following drugs is used for narcoanalysis -AtropinePhenobarbitoneScopolaminePethidine  <response>: Scopolamine is used as truth serum. Drugs commonly used in narcoanalysis are 1. Thiopentone sodium Sodium pentothal 2. Scopolamine hydrobromide 3. Sodium secnol 4. Benzodiazepines REF;THE SYNOPSIS OF FORENSIC MEDICINE:KS NARAYANA REDDY;28th EDITION 