Which of the below processes convert NADH to NAD+?
I. Glycolysis
II. Oxidation of Pyruvate
III. Citric Acid Cycle
IV. Oxidative Phosphorylation
V. Alcohol Fermentation
VI. Lactic Acid Fermentation
a.I only
b.I, II, III
c.IV only
d.IV and V
e.V and VI
f.IV, V, and VI