When Acetyl-CoA and NADPH Are Needed for Lipid Synthesis, Which $\beta$

When acetyl-CoA and NADPH are needed for lipid synthesis, which of the following reactions is used to produce NADPH in the cytosol?

A) reduction of oxaloacetate to malate
B) oxidation of malate to pyruvate
C) reduction of fumarate to succinate
D) oxidation of malate to oxaloacetate
E) oxidation of isocitrate to $\beta$ -ketoglutarate