Which of the Following Steps in the Kreb's Cycle Directly $\rightarrow$

Multiple Choice

Which of the following steps in the Kreb's cycle directly produces a molecule of ATP (or GTP) ?

A) citrate $\rightarrow$ isocitrate
B) isocitrate $\rightarrow$$\alpha$ -ketoglutarate
C) succinyl CoA $\rightarrow$ succinate
D) succinate $\rightarrow$ fumarate
E) malate $\rightarrow$ oxaloacetate