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: Medicine
[{'content': 'In hyperkalemia with brady cardia treatment is- \nSelect and explain. \nA. Calcium gluconate, B. Salbutamol, C. Steroid, D. K+resin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]