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 is not given in acute severe digitalis toxicity \nSelect and explain. \nA. Potassium, B. Digibind, C. Lignocaine, D. None of these', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Hypokalemia precipitates digitalis toxicity but in acute severe digitalis toxicity, there is already hyperkalemia.', 'role': 'assistant'}]