Which of the following interproximal lesions does not involve the dentin,but is does extend more than half way through the enamel?

Question

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Moderate interproximal caries extend more than halfway through the thickness of enamel but do not involve the dentino-enamel junction (DEJ).Incipient interproximal caries extend less than halfway through the thickness of enamel.Advanced interproximal caries extend to or through the DEJ and into dentin but do not extend through the dentin more than half the distance toward the pulp.Severe interproximal caries extend through enamel,through the dentin,and more than half the distance toward the pulp.

Which of the Following Interproximal Lesions Does Not Involve the Dentin,but