Which of the following clinical features are associated with scleroderma?

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Firmness of the oral mucosa along with periodontal diseaseNumerous keratotic lesions on the palmsPresence of Raynaud's phenomenonAll the above conditionsNone of the above

Explanation

Scleroderma is characterized by symptoms including tightening of the oral mucosa and periodontal involvement, multiple palmar keratoses, and Raynaud's phenomenon. Therefore, all of these features are commonly seen in the disease.