Oxalosuccinate Is a Transient Intermediate Formed During Which of the Following

Oxalosuccinate is a transient intermediate formed during which of the following reactions?

A) Citrate $\rightarrow$ Isocitrate
B) Isocitrate $\rightarrow$ $\alpha$ -ketoglutarate
C) Pyruvate $\rightarrow$ Acetyl-CoA
D) Malate $\rightarrow$ Oxaloacetate
E) Succinyl CoA $\rightarrow$ Succinate