Given below are two statements.
Statement-$I$: During aerobic respiration,$ETS$ regenerates co-enzymes such as $NAD^+$ and $FAD^+$ from their reduced forms $NADH + H^+$ and $FADH_2$.
Statement-$II$: During aerobic respiration,$ETS$ generates a major amount of energy in the form of $ATP$ molecules.
In the light of the above statements,choose the correct answer from the options given below.

• A
  Both Statement-$I$ and Statement-$II$ are correct.
• B
  Both Statement-$I$ and Statement-$II$ are incorrect.
• C
  Statement-$I$ is correct but Statement-$II$ is incorrect.
• D
  Statement-$I$ is incorrect but Statement-$II$ is correct.