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
Which is not a high pitched hea sound 
Select and explain. 
A. Mid systolic click, B. Pericardial shudder, C. Opening snap, D. Tumor plop sound
D: Tumor plop sound
Answer: D: Tumor plop sound 
Explanation: Ans. is 'd' i.e., Tumor plop sound Low pitch hea sounds are : S3 S4 Tumor plop sound Mid systolic clicks are Heard in mitral valve prolapse during systole and are high pitch sounds. The pericardial knock (PK) is Also high-pitched and occurs slightly later than the opening snap, corresponding in timing to the abrupt cessation of ventricular expansion after tricuspid valve opening and to an exaggerated y descent seen in the jugular venous waveform in patients with constrictive pericarditis. A tumor plop is A lower-pitched sound that can be heard in patients with atrial myxoma. It may be appreciated only in ceain positions and arises from the diastolic prolapse of the tumor across the mitral valve