In the sieve elements,which one of the following is the most likely function of $P-$ proteins?

Differentiate between (Any two):
$(a)$ Respiration and Combustion
$(b)$ Glycolysis and Krebs' cycle
$(c)$ Aerobic respiration and Fermentation

Select the correct option to complete the following statements:
$(1)$ The $TCA$ cycle begins with the condensation of $OAA$ and water with $Acetyl-CoA$ to yield $Citric$ $acid$.
$(2)$ In fermentation,yeast converts glucose into ethanol under $Anaerobic$ conditions.

Match the following columns:

Column-$I$	Column-$II$
$P$. Aerobic respiration	$I$. Yeast
$Q$. Lactic acid fermentation	$II$. Some bacteria and animal muscles
$R$. Alcoholic fermentation	$III$. Human leukocytes

Pyruvic acid is the end product of glycolysis. What are the three metabolic fates of pyruvic acid under aerobic and anaerobic conditions? Write them in the space provided in the diagram.

Which of these statements is incorrect?