This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics And Genetic Disorders, Subject name: Pediatrics
What is the risk of an affected individual transmitting an autosomal dominant disease to his/her offspring? 
Select and explain. 
A. 50%, B. 100%, C. 25%, D. 60%
A: 50%
Answer: A: 50% 
Explanation: a. 50%(Ref: Nelson's 20/e p 593, Ghai 8/e p 641)