1- The remnant of Hertwigs epithelial root sheath found in pdl clos to cementum : a- Epithelial cell rest of malassez b- Diaphragnate root sheath c- Not of all above 2-Areas from cementum are highly mineralized with less collagen and more ground substance than other part of cementum are : a- Dentin b- Epithelial rest cell C- Not of all above 3-Papilla of tongue which has no taste buds : a- Filiform papilla b- Fungiform papilla c- Circumvallate papilla 4-Papilla of tongue that characterized by mushroom shaped: a- Filiform papilla b- Circumvallate papilla Fungiform papilla C-

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