Which of the following best describes the typical symptom of internal resorption?

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Tenderness when tapping the toothGradual, persistent, and mild aching painAbsence of symptoms, no noticeable signsHeightened toothache when lying down

Explanation

Internal resorption usually presents as a slow, dull, and continuous pain rather than sharp pain on percussion or increased discomfort when reclining. It may also be symptom-free in some cases, but the most characteristic symptom is a persistent mild ache.