Cementum

A. Less than bone
B. More than bone
C. Equal to that of bone
D. More than that of enamel

A. 10%
B. 30%
C. 60%
D. 90%

A. Is derived from the sheath of hertwig
B. Is acellular in the apical third of the tooth
C. Often overlaps the enamel
D. Does not contain collagen fibres