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: Unknown
[{'content': 'The administration of succinylcholine to a paraplegic patient led to the appearance of dysrhythmias, conduction abnormalities and finally cardiac arrest. The most likely cause is - \nSelect and explain. \nA. Hypercalcemia, B. Hyperkalemia, C. Anaphylaxis, D. Hypermagnesemia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans-B', 'role': 'assistant'}]