During cellular respiration,the number of $ATP$ molecules used during the conversion of glucose into glyceraldehyde-$3$-phosphate is:

In glycolysis,a glucose molecule is converted into:

The phase common in both aerobic and anaerobic respiration is:

How many $ATP$ are used in glycolysis,or for the complete phosphorylation of a glucose molecule,how many $ATP$ molecules are required?

In pyruvic acid,the number of carbons 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: