I would go with B but wait for some one else to answer just in case
Paradox; a statement or proposition that, despite sound reasoning from acceptable premises, leads to a conclusion that seems senseless, logically unacceptable, or self-contradictory.
Oxymoron; a figure of speech in which contradictory terms appear in conjunction.
Hope this helps :D
Answer:
Excuse me, but what poem are you talking about?