1916. The first sign of future deciduous teeth as a thickening of oral ectoderm appears at about_____________?

A. 25th day of Intra uterine life
B. 34th day of Intra uterine life
C. 56th day of Intra uterine life
D. 20 wks of Intra uterine life
✅ The correct answer is option C. 56th day of Intra uterine life.

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