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: Medicine
Test for reversible cardiac ischemia- 
Select and explain. 
A. Angiography, B. Thallium scan, C. MUGA, D. Resting Echocardiography
B: Thallium scan
Answer: B: Thallium scan 
Explanation: None