Following is the absorption spectrum of photosynthesis. Identify X,Y, and Z.
 

	X	Y	Z
1.	Chlorophyll a	Carotenoids	Chlorophyll b
2.	Chlorophyll b	Carotenoids	Chlorophyll a
3.	Chlorophyll a	Carotenes	Xanthophyll
4.	Chlorophyll b	Chlorophyll a	Phycobilin

• A

  1

• B

  2

• C

  3

• D

  4