This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'Trinucleotide repeats seen in Huntington disease is? \nSelect and explain. \nA. GAA, B. CAG, C. CTG, D. CGG', 'role': 'user'}, {'content': 'Answer: B \nExplanation: GAA - Friedreich ataxia\nCAG - huntington disease\nCTG - Myotonic dystrophy\nCGG - Fragile x syndrome', 'role': 'assistant'}]