This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Which of the following muscle relaxant is contraindicated in muscle dystrophy? \nSelect and explain. \nA. Quinine, B. Succinyl choline, C. Dantrolene, D. All of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Succinyl choline can cause hyperkalemia in especially in nerve & muscle disorders. Hence it is avoided in patients with paraplegia, Guillain barre syndrome, Myasthenia gravis & muscle dystrophy.', 'role': 'assistant'}]