This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics, Subject name: Pathology
Which of the following is X-linked recessive? 
Select and explain. 
A. Duchenne muscular dystrophy, B. Hypophostemic rickets, C. Marfans syndrome, D. Downs syndrome
A: Duchenne muscular dystrophy
Answer: A: Duchenne muscular dystrophy 
Explanation: Ans. (a) Duchenne muscular dystrophy(Ref: R 9th/pg 142)a. Duchenne muscular dystrophyX-linked recessiveb. Hypophostemic ricketsX-linked dominantc. Marfans syndromeAutosomal dominantd. Downs syndromeChromosomal trisomy