Anonymous accounts have user name . . . . . . . .

Answer: Option B

This question is about anonymous accounts in MySQL. Anonymous accounts are special accounts that don't need a username and password to connect to the database.

Think of it like walking into a library. You can browse the books without needing a library card (username and password), just like an anonymous account can access a MySQL database without needing specific credentials.

So, what's the username of an anonymous account? The answer is blank! It doesn't have a username because it's anonymous.

Let's look at the options:

Option A: root - This is the default administrator account in MySQL, not an anonymous account.

Option B: blank - This is the correct answer! Anonymous accounts don't have a username.

Option C: super - This isn't a standard MySQL account type.

Option D: prime - This isn't a standard MySQL account type.

Therefore, the answer is Option B: blank.