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
Which is best for plaque morphology in atherosclerosis? 
Select and explain. 
A. CCTA, B. Echocardiography, C. ECG, D. Coronary angiography
A: CCTA
Answer: A: CCTA 
Explanation: Ans. A. CCTA* Coronary lesions prone to rupture and subsequent development of MI have different morphology compared with stable plaques and can be evaluated by CCTA to identify vulnerable plaques before they lead to clinical events. Large plaque volume, low CT attenuation, napkin- ring sign and spotty calcification are all associated with a high risk of acute cardiovascular events in patients.* Coronary angiography is used to detect percentage of blockage in coronary artery.