Hi @FinaSS,
Unfortunately, SQL doesn't support dynamic table names with prepared statements.
One work around is to disable prepared statements, but it's important to keep in mind that would put you at risk of an Insertion Attack. Another option could be to write out all the possible queries you'd like to run and select them based off of the value selected from your drop down.
Hope that helps you move forward! Thank you @pyrrho for the help! 