Question

Both the crown and root of tooth is covered by a layer of bony hard substance called A) Enamel ​B) Dentine C) Bony socket D) Cementum

Answer 1

a)enamel

The crown and root of a tooth is covered by a hard bony structure called enamel

Answer 2

Both the crown and the root of the tooth is covered by the layer of a bony hard substance called the Enamel.

   "Enamel is a hard" covering that protects the parts of the teeth from microorganisms and various other damages.

     When a microbe forms a plaque on the "tooth surface" it secretes acids to destruct the mineral construct of the teeth, this is protected by the enamel.  

  This forms the strongest substance that is present in our body.