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
A female patient chandani develops cheat pain which is not associated with exercise and chest auscultation shows multiple non ejection clicks. The inveatinvesti which is used to diagnose the disease is 
Select and explain. 
A. Echocardiography, B. Pyrophosphate, C. Thallium 201 scan, D. ECG
D: ECG
Answer: D: ECG 
Explanation: Ref Harrison 19 th ed pg 1546 The investigation of choice in MVP is Echocardiography