Pistol -- Option 4
Sure, there's probably something under the bed, but looking in the dresser prevents me from having to get low down in a position that isn't very easy to quickly escape from. At least looking in the dresser, I remain entirely on my feet. There could be something very important to the previous inhabitant of the room in the headboard, I know I'd keep things important to me there.
But there's a greater chance that there's food in the dresser. I know that's where I would (and did, for many, many years) hide food.