<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:An 8-year-old boy is brought to the pediatrician because his mother is concerned about recent behavioral changes. His mother states that she has started to notice that he is slurring his speech and seems to be falling more than normal. On exam, the pediatrician observes the boy has pes cavus, hammer toes, and kyposcoliosis. Based on these findings, the pediatrician is concerned the child has a trinucleotide repeat disease. Which of the following trinucleotide repeats is this child most likely to possess?? A: CGG, B: GAA, C: CAG, D: CTG, E: GCC,  <response>: Based on the clinical findings described in the question stem, the pediatrician suspects the child has a trinucleotide repeat disease. The key findings are slurred speech, frequent falls, pes cavus, hammer toes, and kyposcoliosis. This constellation of symptoms and signs is highly suggestive of Friedreichs ataxia, which is caused by an abnormal expansion of the GAA trinucleotide repeat in the FXN gene. Friedreichs ataxia typically presents in childhood with progressive loss of coordination and balance due to degeneration of the spinal cord and peripheral nerves. The other trinucleotide repeats listed are not associated with Friedreichs ataxia.B: GAA 