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 Chandanl develops chest pain which Is not associated with exercise and chest auscultation shows multiple non ejection clicks. The Investigation which Is used to diagnose the disease Is - 
Select and explain. 
A. Echocardiography, B. Pyrophosphate scan, C. Pyrophosphate scan, D. ECG
A: Echocardiography
Answer: A: Echocardiography 
Explanation: An echocardiography, echocardiogram, cardiac echo or simply an echo, is an ultrasound of the hea. An abnormal echocardiogram: Image shows a midmuscular ventricular septal defect. The trace in the lower left shows the cardiac cycle and the red mark the time in the cardiac cycle when the image was captured. Colors are used to represent the velocity and direction of blood flow. Ref Davidson 23rd edition pg 345