This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'All of the following are characterized by trinucleotide repeat affecting the job coding regions except \nSelect and explain. \nA. Friedrich ataxia, B. Fragile X syndrome, C. Huntington disease, D. Myotonic dystrophy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: ref Robbins 9/e p168 Huntington disease is characterized by trinucleotide repeat affecting the coding region.rest all conditions mentioned in the options affects the non coding regions', 'role': 'assistant'}]