Unable to sit independently at ___ months in Duchenne dystrophy development?

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Multiple Choice

Unable to sit independently at ___ months in Duchenne dystrophy development?

Explanation:
Duchenne muscular dystrophy causes proximal muscle weakness that first hits the trunk and hip areas, so gross motor milestones that rely on trunk control, like sitting, are affected early. Sitting independently requires enough strength and control from the hip extensors and trunk muscles; when a child with Duchenne cannot sit by about 7 months, it signals early proximal weakness and delayed milestone achievement. This makes 7 months the best indicator among the options for initial inability to sit independently in this condition.

Duchenne muscular dystrophy causes proximal muscle weakness that first hits the trunk and hip areas, so gross motor milestones that rely on trunk control, like sitting, are affected early. Sitting independently requires enough strength and control from the hip extensors and trunk muscles; when a child with Duchenne cannot sit by about 7 months, it signals early proximal weakness and delayed milestone achievement. This makes 7 months the best indicator among the options for initial inability to sit independently in this condition.

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