The instantaneous source of energy is

What is the full form of $DHAP$?

What is the net gain of $ATP$ when each molecule of glucose is converted to two molecules of pyruvic acid?

What type of process is glycolysis?

Glycolysis is $................$

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 $R:$ First $ATP$ is used in converting glucose into glucose-$6$-phosphate and second $ATP$ is used in conversion of fructose-$6$-phosphate into fructose-$1,6$-bisphosphate.
In the light of the above statements,choose the correct answer from the options given below: