<prompt> Positive zone of enamel caries is the:Translucent zoneDark zoneBody of the lesionSurface zone  <response>: The dark zoneThis lies adjacent and superficial to the translucent zone. It has been referred to as the positive zone because it is usually present. This zone is formed as a result of demineralization and appears dark brown in ground sections examined by transmitted light after imbibition with quinolone. 