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': 'Pulsus Bigeminus is seen in therapy with \nSelect and explain. \nA. Digitalis, B. Beta blockers, C. ACE inhibitors, D. Calcium channel blockers', 'role': 'user'}, {'content': 'Answer: A \nExplanation: o Pulsus Bigeminus is recognized as a cause of digitalis toxicity.\no Pulsus Bigeminus is a disorder of rhythm (irregular rhythm; arrhythmia) most commonly caused by Premature Ventricular Contracons that results in a pulse with irregular rhythm that alternates in amplitude (pressure) from beat to beat.\nThe most common cause of Pulsus Bigeminus is Digitalis and Pulsus Bigeminus is recognized as a cause of digitalis toxicity :', 'role': 'assistant'}]