The last electron acceptor in the Electron Transport System $(ETS)$ is

The correct sequence of electron carriers in the synthesis of $ATP$ is .........

Mobile electron carriers in $ETS$ in the mitochondrial membrane are

Aerobic respiration,which yields maximum $ATP$ molecules,is completed in:

Hibernating animals have tissues containing mitochondria with a membrane protein that accelerates electron transport while blocking the synthesis of $ATP$. What is the consequence of this?

Given below are two statements.
Statement-$I$: Cytochrome $c$ is a small, copper-containing protein loosely attached to the inner membrane.
Statement-$II$: Cytochrome $c$ acts as a mobile electron carrier transferring electrons between complex $I$, $II$, and $IV$.
In the light of the above statements, choose the correct answer from the options given below.