True about third hea sound is

Answer is C (Absent in MS): Third hea sound (S3) is commonly seen in association with ventricular dysfunction. Ventricular function is usually. normal with MS and hence S3 is usually not a feature of MS. Physiological S3 may be heard in athletes, while constrictive Pericarditis and ischaemic hea disease (MI) are established causes of pathological S3.