The answer is A or electron carriers.
The Krebs cycle produces the electron carriers NADH and FADH2.
Ans. (A). electron carriers.
Krebs cycle can be defined as a series of chemical reactions, which involves oxidation of acetyl-CoA to release energy in the form of ATP, along with NADH and FADH2 molecules.
The NADH and FADH2 act as electron carriers and they are further oxidized to NAD and FAD+ to generate energy for ATP formation through electron transport chain.
Thus, the correct answer is option (A).
.