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
Which of the following represent the commonest mode of inheritance of congenital hea disease? 
Select and explain. 
A. Autosomal dominant, B. Autosomal recessive, C. Sex linked dominant, D. Multifactorial
D: Multifactorial
Answer: D: Multifactorial 
Explanation: 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