Test on Glycolysis

How many ATP molecules are produced through glycolysis?
(a)Six molecules of ATP are created in the second half of glycolysis after two are required in the first half, for a net gain of four molecules of ATP.
(b)Two ATP molecules are used in the initial steps and four are produced in the latter stages, for a net gain of two ATP molecules.
(c)Two molecules of ATP are created in glycolysis, and none are used in the process.

Answer
(b)Two ATP molecules are used in the initial steps and four are produced in the latter stages, for a net gain of two ATP molecules.