<prompt> Which of the following represent the commonest mode of inheritance of congenital hea disease?Autosomal dominantAutosomal recessiveSex linked dominantMultifactorial  <response>: Cardiovascular defects are the most common among all the bih defects. These malformations occur due to complex multifactorial genetic and environmental causes. In Ref: Harrisons Principle of Internal Medicine, 16th Edition, Page 1920 