A 5 year old boy suffering from Duchenne muscular dystrophy has to undergo tendon lengthening procedure. The most appropriate anaesthetic would be –
Amongst the given options only a is applicable i.e. induction by thiopental and maintenance by halothane and N2O.

About option 'd'

In this option, upto induction is correct. However maintenance cannot be done only by oxygen.

About option b & c

Succinylcholine is contraindicated in muscular dystrophy.
Induction with intravenous thiopentone and N2O; and halothane for maintenance
Induction with intravenous suxamethonium and N2O; and oxygen for maintenance
Induction with intravenous suxamethonium and N2O; and halothane for maintenance
Induction with inhalation halothane and N2O; oxygen for maintenance