A 15 year old boy suffering from Duchenne muscular dystrophy has to undergo tendon lengthening procedure.The most appropriate anaesthetic would be

• A. Induction with intravenous suxamethonim and N2O;and oxygen for maintenance
• B. Induction with intravenous thiopentone and N2O;and halothane for maintenance
• C. Inhalation induction with inhalation halothane and N2O;and oxygen for maintenance
• D. Induction with intravenous suxamethonim and N2O;and halothane for maintenance