This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetic Disorders, Subject name: Biochemistry
Which of the following trinucleotide repeat disorder and the repeat is wrongly paired? 
Select and explain. 
A. Kennedy disease - CAG, B. Friedreich's Ataxia - CGG, C. Myotonic dystrophy - CTG, D. Huntington's chorea - CAG
B: Friedreich's Ataxia - CGG
Answer: B: Friedreich's Ataxia - CGG 
Explanation: Disease Repeat Fragile X syndrome CGG Friedreich's Ataxia GAA Myotonic dystrophy CTG Spinobulbar muscular atrophy (Kennedy disease), Spinocerebellar ataxia, Huntington's disease CAG