The correct option is B ameloblast , odontoblast
Enamel is the outermost layer of teeth. It is the hardest substance of the human body. It forms the crown part of the teeth. It is formed by ameloblast cells.
Dentine is a layer of material found just below the enamel of the tooth. It is a cementing material that joins the enamel and the pulp. It is formed by odontoblast cells. It provides support to the enamel and protects the pulp from microbes.
Cement helps in joining the teeth in the socket.
Osteoblasts form new bone.