Maintenance of anaesthesia in 70 yr male for surgery duration 4-6 hrs should ideally include?
O2+Air + Isoflurane + Pancuronium + Morphine O2+Air + Sevoflurane + Pancuronium + Remifentanyl O2+Air + Halothane + Vecuronium + Morphine O2+Air + Desflurane + Atracurium + Remifentanyl