Explanation:
(d) Decarboxylation is the removal or loss of a carboxyl group from an organic compound, usually resulting in the formation of carbon dioxide. It does not involve in glycolysis.
Substrate level phosphorylation is a melabolic reaction that results in the formation of ATP or GTP by conversion of a higher energy substrate into lower energy product using some of the released lower energy product using some of the released chemical energy, the Gibb's free energy, to transer a phosphoryl $\left( \text{P}{{\text{O}}_{3}} \right)$ group to ADP or GDP.
In glycolysis, the first substrate-level phosphorylation occurs after the conversion of 3 phosphoglyceraldehyde to 1, 3 -eisphosphoglycerate by glyceraldehyde 3-phosphate dehydrogenase. 1 , 3 bisphosphoglycerate is then dephosphorylated by phosphoglycerate kinase, producing 3 phosphoglycerate and ATP.
The second substrate level phosphorylation occurs by dephosphorylating phosphoenop pyruvate, catalyzed by pyruvate kinase, producing pyruvate and ATP.