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: Radiology
Drug used to perform stress ECHO – 
Select and explain. 
A. Thallium, B. Dobutamine, C. Adrenaline, D. Adenosine
B: Dobutamine
Answer: B: Dobutamine 
Explanation: Stress echocardiography is done either by Physical stress (Exercise :- treadmill or cycling) or by pharmacological stress (dobutamine).