A paradox is : a.) a statement that contradicts itself and has no answer.
Hence option a) is correct answer.
Paradox is a statement that seems to go against common sense but may still be true, a false statement that seems true at first or a person/thing having qualities that seem to be opposite.
A rhetorical device or a self-contradictory statement that can actually be true is called paradox. This is what makes them stand out and therefore they play an important role in literature and also in everyday life. Sometimes, they can just be an entertaining brain teaser.
Russell's paradox is the most known of the logical or set-theoretical paradoxes.
To know more about paradox, refer
https://brainly.com/question/17731343
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