Read the table given below and identify the physiological processes corresponding to A, B, C and D.
 

ATP is utilized initially and later produced	A
ATP is utilized but not produced	B
ATP is produced but not utilised	C
ATP is neither produced nor utilised	D

	A	B	C	D
1	Calvin cycle	EMP pathway	Cyclic electron transport	Photo respiration
2	EMP pathway	Calvin cycle	Cyclic electron transport	Link reaction
3	EMP pathway	Photo respiration	Cyclic electron transport	Calvin cycle
4	Cyclic electron transport	Photo respiration	EMP pathway	Calvin cycle

In glycolysis. ATP is utilised at two steps. One is where glucose is converted to glucose - 6 phosphate and another step is where fructose is converted to fructose 6 phosphate. ATP is produced when 1,3 bisphosphoglyceric acid is converted into 3-phosphoglyceric acid and when phosphoenolpyruvate is converted into ATP. ATP is utilized in calvin cycle during reduction and regeneration steps but not produced. ATP is produced but not utilized in cyclic electron transport. ATP is neither produced nor utilised during link reaction.