<prompt> Severe mitral stenosis is identified by:Loud S1Loud opening snapDuration of mid-diastolic murmurIntensity of mid-diastolic murmur  <response>: Ans.c Duration of mid-diastolic murmurRef: Harrison 19th ed. 1539 Severity of mitral Stenosis implies that the mitral valve orifice has become smaller in size. This implies that the blood will take longer time to go from left atrium to left ventricle. This implies the LENGTH Of murmur will increase. 