This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
Which of the following disease is transmitted as an X-Iinked inheritance? 
Select and explain. 
A. Phenylketonuria, B. Alpo's syndrome, C. Myotonic dystrophy, D. Spinal muscular atrophy
B: Alpo's syndrome
Answer: B: Alpo's syndrome 
Explanation: Robbins and Cotran pathologic basis of disease South Asia edition. *alpory's syndrome is an d linked dominant disorder having mutation in alpha 5 chain of type 4 collagen located on x chromosome. *phenylketonuria -is an autosomal recessive disorder . *myotonic dystrophy - autosomal dominant. *spinal cord atrophy-autosomal recessive.