This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Musculoskeletal  disorders, Subject name: Pediatrics
The mode of inheritance of Duchenne muscular dystrophy is 
Select and explain. 
A. Autosomal dominant, B. Autosomal recessive, C. X-linked dominant, D. X-linked recessive
D: X-linked recessive
Answer: D: X-linked recessive 
Explanation: Duchene muscular dystrophy is a X linked recessive disorder. Gait disturbances is commonly seen and calf muscle pseudo hyperophy is also seen