Match Column I with Column II

	Column I		Column II
a.	Standing crop	i.	The amount of nutrients present in the soil at any given time.
b.	Standing state	ii.	Certain mass of living material at a particular time at each trophic level present.
c.	Gaseous cycle	iii.	Phosphorus Cycle
d.	Sedimentary cycle	iv.	Nitrogen cycle

• A

  a-ii, b-i, c-iv, d-iii

• B

  a-i, b-ii, c-iv, d-iii

• C

  a-i, b-ii, c-iii. d-iv

• D

  a-i, b-ii, c-iii, d-iv