According to Newton's first law, when the net force on the body is zero, the result will be that the body will have constant velocity. So when the force of friction on fireman's hands and the weight are equal, the fireman will slide down the pole with a constant velocity.
The one with the greatest mass would, when everything else is equal. I'm having trouble making out your list of choices.
..............no.......................
The answer is referred pain.
Referred pain is the slow pain that is origination from an internal organ is often perceived as coming from an area of the body totally unrelated to the source.
Pain is distressing feeling. When any stimuli damages, we feel a pain such as when finger burns or toe is stabbed etc.