But I think I'm on right lines. You need to phrase the questions similar to how I did above to help eliminate ja/da translation.
Also need to eliminate random.
So something like: to A; if I asked you if B is random, would you say ja?
Then based on answer, I think you can work out one who cannot be random.
Ask that god a question like: if I asked you if you're true, would you say ja?
Then you should be able to work out if that god is true or false. Then simply ask them if one of others is random.
On phone so can't really explain better. But been through it in my head and think it works