Which of the following findings are used to diagnose oral submucous fibrosis?

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Fibrosis occurring near the epithelial layerAlterations in the epithelial tissueModifications in the submucosal layerAll of these changes combined

Explanation

Oral submucous fibrosis is identified by a combination of juxta-epithelial fibrosis, epithelial alterations, and changes in the submucosa. Therefore, all these features collectively contribute to the diagnosis.