What is the correct sequence of microscopic zones observed in dentinal caries starting from the dentino-enamel junction?

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Sclerosis zone, area of mineral loss, bacterial penetration zoneBacterial penetration zone, area of mineral loss, sclerosis zoneSclerosis zone, bacterial penetration zone, area of mineral lossArea of mineral loss, sclerosis zone, bacterial penetration zoneNone of the above

Explanation

The proper order of microscopic zones in dentinal caries beginning at the dentino-enamel junction is bacterial penetration zone, followed by the area of mineral loss (decalcification), and finally the sclerosis zone. This sequence reflects the progression of carious invasion into dentin.