In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.

Question: Among the many molecules of high energy phosphate compounds that are formed as a consequence of the functioning of the citric acid cycle, a molecule is synthesized at the substrate level. In which of the following reactions does it produce you?
Options: <0> Citrate -ketoglutarate. <1> Succinyl-CoA succinate. <2> Succinate fumarate. <3> Fumarate malate. <4> Malate oxaloacetate.
chemistry