ANS:C - 12

The answer is 10.
TCA has eight steps.
4 of these steps are oxidative.
Which are steps 3,4,6 & 8.
They are 1 ATP that is produced at substrate level phosphorylation that is synthesized to become 1 just like that but in the 4 oxidative steps 1 step Carries FAD which translates in a 1.5 atp, then the remaining 3 NADH accounts for 2.5 each.
If you add rightfully you get 10 atp Molecules per cycle. (1)