Occlusal caries index (ICDAS 1 and Histological Validation), code 4 means?: (A) Enamel demineralization Limited to outer 50% of enamel, (B) Demineralization involving inner 50% of enamel upto DEJ, (C) Demineralization involving outer 50% of dentine, (D) Demineralization involving inner 50% of dentine
Answer is D. None