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
Cardiotoxicity caused by radiotherapy and chemotherapy is best detected by: 
Select and explain. 
A. Echocardiography, B. Endomyocardial biopsy, C. ECG, D. Radionuclide scan
B: Endomyocardial biopsy
Answer: B: Endomyocardial biopsy 
Explanation: Ans. Endomyocardial biopsy