A 6 yrs old baby is scheduled for examination of the eye under anaesthesia.The father informed that for the past 6 months the child is developing progressive weakness of both legs.His elder sibling had died at age of 14 yrs.Which drug would you definitely avoided during the anaesthetic management?

• A. Succinylcholine
• B. Thiopentone
• C. Nitrous oxide
• D. Vecuronium