This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Muscle relaxants, Subject name: Anaesthesia
[{'content': 'A 6 year old boy taken for ophthalmic examination under anaesthesia. His father told that he has lower limb weakness & his elder brother died at 14 years of age. Which anaesthetic drug has to be avoided. \nSelect and explain. \nA. Succinylcholine, B. Pancuronium, C. Atracurium, D. Dexacurium', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ROLE OF SUCCINYLCHOLINE ON MUSCLES * Succinylcholine, commonly used in anesthesia, paralyzes normal skeletal muscles by blocking transmission at the myoneural junction', 'role': 'assistant'}]