I voted for C because PL/SQL isn’t in the list and it’s not exotic enough to count as other. The “C” I do is actually (Oracle) Pro*C which is C with embedded SQL, so that’s a sort of mixture. Recently I’ve been using Java but I’ve not been at it long enough to say I’ve used it most.
It’s a split between Java and Haskell. I’m forced to teach undergraduates in Java, but I use Haskell for all my own projects.