In the electron transport chain,which cytochrome donates electrons to $O_2$ during the final oxidation step?

$A-$ Proton is transported to $F_1$ through $F_0$.
$R-$ Oxidation of $NADPH_2$ occurs in $F_1$.

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

Cyanide-resistant respiration is found in:

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.

Which of the following is a more accurate statement about respiration?