What will be the output of the following MySQL command?

SELECT fname
FROM person
WHERE emp_id != 6 OR emp_id IS  NULL;

This MySQL command is used to retrieve the 'fname' (first name) from the 'person' table.
Let's break down the WHERE clause:
* emp_id != 6: This condition selects all rows where the 'emp_id' is not equal to 6.
* emp_id IS NULL: This condition selects all rows where the 'emp_id' is NULL.
The OR operator combines these conditions, meaning the query will retrieve data if either of the conditions is true.
Therefore, the correct answer is Option A: Only those names whose emp_id is not equal to 6 or emp_id with NULL values.