Quiz lit it helped me especially this specific question
The correct answer would be C - this is a pun, or a play on words. The main character's name is Ernest, and it is pronounced the same way as "earnest", meaning "honest", a quality the main character of this play should have.
The epigram that Algernon uses in his last line provides a critique about. how the rules of Victorian society were not very strict and were not taken seriously. ... how the rules of Victorian society dictated many things, even what was proper to read.