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
[{'content': 'Which of the following represent the commonest mode of inheritance of congenital hea disease? \nSelect and explain. \nA. Autosomal dominant, B. Autosomal recessive, C. Sex linked dominant, D. Multifactorial', 'role': 'user'}, {'content': "Answer: D \nExplanation: Cardiovascular defects are the most common among all the bih defects. These malformations occur due to complex multifactorial genetic and environmental causes. In Ref: Harrison's Principle of Internal Medicine, 16th Edition, Page 1920", 'role': 'assistant'}]