Which of the following reactions has an oxidized product?

A) Carboxylic acid $\rightarrow$ aldehyde
B) R-SH + RSH $\rightarrow$ R-S-S-R
C) Alcohol $\rightarrow$ Ketone
D) Glutamate $\rightarrow$ $\alpha$ -Ketoglutarate
E) None of the above are correct