For every turn of the citric acid cycle, one molecule of , four molecules of , and one molecule are produced.

For every turn of the citric acid cycle, one molecule of ATP, four molecules of NADH and one FADH₂ molecule is produced.

Explanation:

"For each turn of the cycle, a molecule equivalent to ATP is produced, and 5 pairs of high-energy electrons are captured by 5 carrier molecules: 4 NADH molecules and 1 FADH2. FAD and FADH2 are molecules similar to NAD+ and NADH, respectively"

Hope this helps

b would be the right answer

i think that c)gold was found there

but i am not sure