I think I may have figured out the answer too my last music theory question

They are labeling the different sections, but I thought you were asking if the sections had specific names to the A & B. They don’t as far, as I know. The names come from how you arrange the sections and which sections are included. As far as the rest of your question, that would vary a lot based on the various section used. Be safe and be well.

Are you serious?