Structural Organisation In Animals

\(\text { Match the following characteristics of tooth. }\)

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Column I		Column II
i.	Enamel	a.	Made up of calcified connective tissue.
ii.	Dentine	b.	Contains blood vessels and nerves
iii.	Pulp cavity	c.	Covered by cementum
iv.	Root	d.	\( \text { Hardest substance } \)

Choose the correct option from below.