This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics And Genetic Disorders, Subject name: Pediatrics
Abnormality involving which chromosome is seen in Hunter disease? 
Select and explain. 
A. X chromosome, B. Y chromosome, C. Chromosome 21, D. Chromosome 22
A: X chromosome
Answer: A: X chromosome 
Explanation: a. X chromosome(Ref: Ghai 9/e p 640 9/e p 640)All types of mucopolysaccharidoses have autosomal recessive inheritance except Hunter disease, which is X linked recessive.