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
Drug used to perform stress ECHO? 
Select and explain. 
A. Thallium, B. Dobutamine, C. Adrenaline, D. Adenosine
B: Dobutamine
Answer: B: Dobutamine 
Explanation: 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.