Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: ATP is used at two steps in glycolysis.
Reason R: The first ATP is used in converting glucose into glucose-6-phosphate and the second ATP is used in the conversion of fructose-6-phosphate into fructose-1,6-diphosphate.
In the light of the above statements, choose the correct answer from the options given below: