An experiment using two leaves, a variegated leaf or a leaf that was covered with black paper and one that was exposed to light on testing these leaves for starch shows that photosynthesis occurs only in ____A_____ part of leaf in the presence of ___B___.
 

	A	B
1.	non-green	sunlight
2.	green	green light only
3.	non-green	blue light only
4.	green	sunlight