Match the items given in column I with those in column II and select the correct option.

	Column I		Column II
(a)	Notochord	(i)	Serial repetition of organs
(b)	Metamerism	(ii)	Undifferentiated layer between the ectoderm and the endoderm
(c)	Coelom	(iii)	Body cavity lined by mesoderm
(d)	Mesoglea	(iv)	Mesodermal rod-like structure

	(a)	(b)	(c)	(d)
1.	iv	i	iii	ii
2.	ii	i	iii	iv
3.	iv	iii	i	ii
4.	i	iv	ii	iii

The notochord is a mesodermal  rod-like structure formed on the dorsal side during embryonic development in some animals.

Metamerism is the phenomenon of the division of the body into segments with a serial repetition of at least some organs. 

The body cavity, which is lined by mesodermal peritoneum is called coelom.

Mesoglea is an undifferentiated layer present in between the ectoderm and the endoderm in the body wall of coelenterates.