Option B
The water has a higher heat content than the oven so you would be burned by sticking your hand briefly in the pot but not by sticking your hand briefly in the oven
The boiling water has a below temperature than the air in the warm oven, but because it is much thicker, heat is conveyed to your arm at a tremendous rate due to the more common contentions between your arm and the water fragments.
The chief origin of heat is radiation. Fans inside the oven will enhance cooking times by convection of the air. Water has a large specific heat which implies it will take an extended time to heat up. The high specific heat is because water is from its close bonding arrangement.