<prompt> Anaesthetic gas with maximum respiratory irritationDesfluraneSevofluraneEnfluraneHalothane  <response>: Desflurane, unlike halothane or sevoflurane has a pungent smell which makes it unpleasant for inhalational induction. When more than 6 desflurane is used, the pungency produces salivation, airway irritation, breath holding and coughing. Ref:- Stoeltings Pharmacology and Physiology in Anesthetic Practice 5th edition; pg num:- 101 