Which among the following represents the process of transamination?

Transamination is the process where an amino group is transferred from one amino acid to a keto acid, resulting in the formation of a new amino acid and a new keto acid. This reaction is catalyzed by the enzyme transaminase.

In the given options, the reaction between Glutamic acid (an amino acid) and Oxaloacetic acid (a keto acid) to form $\alpha$-ketoglutaric acid (a keto acid) and Aspartic acid (an amino acid) represents transamination.

The reaction $\alpha$-ketoglutaric acid + $\text{NH}_4$ + $\text{NADPH}_2 \rightarrow$ Glutamic acid + $\text{H}_2\text{O}$ + NADP represents reductive amination.

The reactions involving the addition of $\text{NH}_4$ and ATP to form amides (like Asparagine) represent amidation.

Answer: Glutamic acid + Oxaloacetic acid $\rightarrow\alpha$-ketoglutaric acid + Aspartic acid