This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
[{'content': 'Drug used to perform stress ECHO? \nSelect and explain. \nA. Thallium, B. Dobutamine, C. Adrenaline, D. Adenosine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref: R Alagappan - Manual of Practical Medicine 4th Edition.pg no:123 Stress ECHO A stress ECHO can be done following administration of adenosine, dobutamine or dipyridamole to detect evidence of ischaemia.', 'role': 'assistant'}]