The answer is 4

1.) Increases in NADH, Succinyl CoA, ATP, Citrate inhibit citrate synthase.

2.) Increases in ATP will inhibitisocitrate dehydrogenase.

3.) Increases in succinyl CoA and NADH will inhibit succinate thiokinase.

2 moles of pyruvate produce 2 ATP, 6 reduced NAD, 2 reduced FAD

In plants it is metabolized from photosynthesis to form chlorophyll.
In animals it is metabolized in the form of energy originating from the liver.

Plant and microbial enzyme uses ATP, but animal enzyme uses GTP