Sudden cardiac death may occur in all of the following except :

Answer is D (Ventricular septal defect) Amongst the options provided ventricular septal defect is the least likely diagnosis to result in sudden cardiac death. Hyperophic and Dilated Cardiomyopathy : The cardiomyopathies (Hyperophic and Dilated) are the second most common category of diseases associated with risk of 'Sudden cardiac death'.- Harrison 16th/1620 Eisenmenger's Syndrome : "Most patients with the Eisenmenger's syndrome die of 'sudden cardiac death', probably from a ventricular arrythmia." Ventricular septal defect : The occurance of sudden cardiac death in cases of isolated ventricular septal defect has not been emphasized in literature. Sudden death may probably be seen in early childhood but only isolated case repos have been documented. VSD therefore is the least likely diagnosis and hence the answer of exclusion.