Task: Question Answering
Input (English): 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:  <1> Citrate → α-ketoglutarate. <2> Succinyl-CoA → succinate. <3> Succinate → fumarate. <4> Fumarate → malate. <5> Malate → oxaloacetate.
Output (English): 2