The formation of hard tissue takes place in the:

 # The formation of hard tissue takes place in the:

A. Bud stage

B. Cap stage

C. Advanced bell stage

D. Early bell stage

The correct answer is C. Advanced bell stage.

Advanced bell stage is characterized by the commencement of mineralization and root formation. During the advanced bell stage, the boundary between inner enamel epithelium and odontoblasts outlines the future dentinoenamel junction. The formation of dentin occurs first as a layer along the future dentinoenamel junction in the region of future cusps and proceeds pulpally and apically.

Reference: Orban's Oral Histology and Embryology, 14th Edition