<prompt> Long acting barbiturate is ?ThiopentoneSecobarbitonePhenobarbitonePentobarbitone  <response>: Ans. is c i.e., Phenobarbitone Long acting barbiturates -4 Phenobarbitone, Mephobarbitone. Sho acting barbiturates-4 Butobarbitone, secobarbitone, Pentobarbitone. Ultrasho acting -4 Thiopentone, Methohexitone, Hexobarbitone. 