About physical sector distribution on compact disc

On “Upgrading and repairing PC S” book (chapter 11 page 525) author says :

“On a disc that can hold a total of 74 minutes of information, that results in a maximum of 333,000 sectors.”

Are those 333,000 sectors included in the interval A or B ?

Interval A : from start of lead in through end of lead out (information area).

Interval B : from end of lead in through start of lead out (program area).

Thanks for help.

I would guess Interval B. It sounds like Interval A is essentially the area where metadata such as volume label, filesystem size, and such are stored. Interval B sounds more like where the actual data is stored.

I could be wrong, however.