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: Pathology
All of the following are autosomal dominant disorder except? 
Select and explain. 
A. Von hippel lindau disease, B. Achondroplasia, C. Duchenner muscular dystrophy, D. Multiple endocrine neoplasia
C: Duchenner muscular dystrophy
Answer: C: Duchenner muscular dystrophy 
Explanation: Duchenne muscular dystrophy is x linked recesive disorder.