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
Test of choice for Reversible Myocardial Ischemia? 
Select and explain. 
A. Thallium scan, B. MUGA scan, C. Resting ECHO, D. Coronary angiography
A: Thallium scan
Answer: A: Thallium scan 
Explanation: A i.e. Thallium Scan