When acetylCoA is fed into the TCA cycle it eventually forms

When acetyl-CoA is fed into the TCA cycle, it eventually forms carbon dioxide. The energy released from this oxidation is conserved in the form of (select all that apply): FADH2 Water GTP Protons NADH

Solution

The TCA cycle produces two carbon dioxide molecules and release of carbon dioxide is coupled with the reduction of NAD+ to NADH.

So its answer is NADH.

Each acetyl coenzyme A proceeded once through the citric acid cycle. Therefore, in total, it created 6 NADH + H+ molecules, two FADH2 molecules, four carbon dioxide molecules, and two ATP molecules.

So answer is above 2