What are the main steps in aerobic respiration? Where does it take place?

Given below are two statements.
$Statement-I$: Enzyme pyruvate dehydrogenase complex brings about oxidative decarboxylation of pyruvic acid.
$Statement-II$: Enzyme pyruvate dehydrogenase is not present in cytosol of prokaryotes.
In the light of the above statements, choose the correct answer from the options given below:

Select the incorrect statement.

The following is a simplified scheme showing the fate of glucose during aerobic and anaerobic respiration. Identify the end products that are formed at stages indicated as $A, B, C$ and $D$. Identify the correct option from those given below.

In which processes do the enzymes succinate dehydrogenase and cytochrome oxidase occur,respectively?

Assertion : Glycolysis is the first step of respiration in which glucose completely breaks into $CO_2$ and $H_2O$.
Reason : In this process,there is net gain of twenty four molecules of $ATP$.