How to select mysql config file, database client version: libmysql - mysqlnd 5.0.11-dev?

Question

MySQL

You need to change the default encoding and comparison in mysql.
The DBMS is integrated into the local XAMPP server.
The C:\xampp\mysql folder contains the following files:

1. my-huge.ini
   
2. my-innodb-heavy-4G.ini
   
3. my-large.ini
   
4. my-medium.ini
   
5. my-small.ini
   
6. wsrep.ini
   

The question is which of these files is the configuration file?