Succinate is oxidized and form:

Explanation

In the citric acid cycle, succinate undergoes oxidation to form fumarate. During this reaction, FAD (flavin adenine dinucleotide) acts as the oxidizing agent and is reduced to FADH2. This process is crucial for transferring electrons to the electron transport chain, which ultimately leads to ATP production.Let's break down why the other options are incorrect:Option A: FAD - This is incorrect because FAD is the molecule that gets reduced, not the product of the reaction.Option B: FADH - This is incorrect as FAD is reduced to FADH2, not FADH.Option D: NADH2 - This is incorrect because NADH2 is not a product of this reaction; it involves the reduction of FAD to FADH2.