Which of the following yields the maximum energy $(ATP)$ upon oxidation?

During prolonged fasting,which of the following is the correct order of utilization of energy sources in the human body?

Before entering the respiratory pathway,amino acids are:

The connecting link among glycolysis,Kreb's cycle,and beta-oxidation of fatty acid is:

$A-$ Breaking down processes within the living organism is anabolism and synthesis is catabolism.
$R-$ The proteins would be degraded by proteases and the individual amino acids (after deamination) depending on their structure would enter the pathway at some stage within the Kreb's cycle or even as pyruvate or acetyl $CoA$.

The sequence of food substances consumed during starvation is: