A) Nothing, just totally naked
B) What you’re wearing and anything you carry with you (even if you’re not carrying it right now) like a bag
C) What you’re wearing, what you carry with you, and the contents of your home (it will be teleported within a few hundred metres on the surface in an accessible location, but obviously won’t be connected to any services like electricity or water)
A. Dead within a day unless helped by a stranger
B. Probably still dead soon but at least I have clothes, I normally carry nothing of use
C. There is a chance I live long enough to learn how to survive with knives, a handgun, and some amount of food and drink. If I get the tools from my garage I guess I can build a makeshift shelter. Probably still a betting favorite to die within a week unless I can find and somehow ingratiate myself to some locals by giving them cool stuff.