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
All of the following are X-linked disorders except - 
Select and explain. 
A. Emery-Dreifuss dystrophy, B. Becker's dystrophy, C. Duchenne's dystrophy, D. Myotonic dystrophy
D: Myotonic dystrophy
Answer: D: Myotonic dystrophy 
Explanation: None