The correct answer is: B. Field
A field is the smallest logical data entity. It is a single piece of data that has a name and a value. For example, a field in a customer database might be the customer’s name, address, or phone number.
A base is a foundation or starting point. It can also refer to a place where something is stored or kept. A bank is a financial institution that provides services such as checking and savings accounts, loans, and investments. A collection is a group of things that are gathered together.
None of the above options are the smallest logical data entity.