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37. A 3 yo boy is being seen in the clinic for a history of "chronic clumsiness". His parents tell you he did not start walking until age 24 mo, and even then he fell a lot unless he held on to something. They sought help, but were told he was merely developmentally slow for his age. Now they say he is getting worse, and has trouble getting up from the floor. He goes from sitting to standing by bracing his arms against his legs. Which of the following is the most likely diagnosis?A. DMDb. Fragile X syndromec. huntington's diseased. marfane. 22qll.2 syndrome

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