Which of the following links carbohydrate and fat metabolism?

Before entering the respiratory pathway,amino acids are:

The following figure shows an amphibolic pathway. What are $P$,$Q$,and $R$?

How are photosynthesis and respiration related to each other?

What substances are transported by $Xylem$ and $Phloem$ respectively?

Given below are two statements:
Statement $I$ - Reactions involved in Krebs cycle are anabolic and catabolic.
Statement $II$ - During oxidation of acetyl $CoA$,stepwise oxidation of the acetyl part of acetyl $CoA$ occurs.
In light of the above statements,choose the most appropriate answer from the options given below.