Question

what is the most common disorder of childhood involving chronic joint inflammation?
stills disease
scleroderma
reiters
chrons

Explanation:

Still's Disease is a type of juvenile idiopathic arthritis (JIA), which is the most common rheumatic disorder in children. It is characterized by chronic joint inflammation. Scleroderma is a connective - tissue disease mainly affecting the skin and internal organs. Reiters (Reactive Arthritis) is an autoimmune condition often triggered by an infection but is not the most common childhood joint - inflammatory disorder. Chron's is an inflammatory bowel disease, not primarily a joint - inflammatory disorder in the context of this question.

Answer:

Still's Disease