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: Pediatrics
NOT a X-linked dominant condition among the following is 
Select and explain. 
A. Familial hypophosphatemic rickets, B. Rett syndrome, C. Fragile X syndrome, D. Duchenne's muscular dystrophy
D: Duchenne's muscular dystrophy
Answer: D: Duchenne's muscular dystrophy 
Explanation: X - linked dominant disorders are

Familial Hypophosphatemic rickets
Rett syndrome
Fragile X syndrome
Alport syndrome
Charcot Marie Tooth disease.