In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives. 

One who has witnessed a debate ___(1)____ argument between two men ___(2)___ strong intellectually, one of whom is a trained logician and the other lacking this advantage, will never forget the impression produced ____(3)_____ him by the unequal struggle. The conflict is like that of a ___(4)____ wrestler, untrained in the little tricks and turns of the science, in the various principles of applying force in a certain way at a certain time, at a certain place, with a ___(5)___ and experienced wrestler.