What will be the output of the following MySQL command?

SELECT *
FROM employee
WHERE title=’HEAD TELLER’;

This question is asking about how to find specific data in a table called "employee" using a MySQL command.

Let's break down the command:

* SELECT *: This part tells MySQL to retrieve all the columns (information) from the table.
* FROM employee: This specifies the table name, "employee", where the data is stored.
* WHERE title = 'HEAD TELLER': This is a filter. It instructs MySQL to only show rows (individual records) where the column named "title" contains the specific value "HEAD TELLER".

Therefore, the correct answer is Option B: All columns but only those rows which contain 'HEAD TELLER' as a "title".

The command effectively searches the "employee" table for employees who have the job title "HEAD TELLER" and displays all the information about them.