A field with the data type can store a unique sequential number that Access assigns to a record. Access will increment the number by 1 as each new record is added.

The correct answer to the following question will be "AutoNumber ".

Explanation:

AutoNumber seems to be a category of details used mostly for creating a manually increased numeric offset in MS Access charts.This data form could be used as a special database identifier for indexes that do not have any other unique or significant value.

So, it's the right answer.