Final answer:
MySQL is an open-source database system that is free for most applications. It uses Structured Query Language (SQL) and is owned by Oracle Corporation, not Microsoft.
Step-by-step explanation:
The correct statement about MySQL among those provided is B) It is license-free for most applications. MySQL is an open-source relational database management system that uses Structured Query Language (SQL). While it is free to use under the GNU General Public License for most applications, there are circumstances where you may need to purchase a commercial license, particularly if you are using MySQL within a commercial product or service. MySQL is not a Microsoft product; it was originally developed by MySQL AB and is now owned by Oracle Corporation