Match Column I with Column II and find the correct match.

	Column I		Column II
a.	Complementary cells	i.	Spring wood and Autumn wood.
b.	Heart wood	ii.	Associated with lenticels formation.
c.	Sap wood	iii.	Non-functional secondary xylem.
d.	Annual ring	iv.	Functional secondary xylem

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

• A

  1

• B

  2

• C

  3

• D

  4