Which mineral elements are essential for the process of respiration?

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.

The final $H_2$ acceptor in the mitochondria is .........

The order of occurrence of the cytochromes in the electron transport system $(ETS)$ is

The sequence of cytochromes in the electron transport system $(ETS)$ is:

During $\text{ETS}$,ubiquinone receives reducing equivalents via