This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
[{'content': 'Which of the following drug is used to perform stress echo? \nSelect and explain. \nA. Noradrenaline, B. Adenosine, C. Adrenaline, D. Dobutamine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Dobutamine acts on beta 1 and beta2 receptors the hea contains beta1 receptors by stimulating beta1 receptors, dobutamine is producing stress-used for a stress echocardiogram An (echo) is a test used to assess the hea\'s function and structures. A stress echocardiogram is a test done to assess how well the hea works under stress. The "stress" can be triggered by either exercise on a treadmill or a medicine called dobutamine. Ref: KD Tripathi 8th ed.', 'role': 'assistant'}]