From the given options, select the correct figure of speech (poetic device) used in the following expression-

The cunning saint fooled the people

Oxymoron

The correct answer is Option (D) → Oxymoron:

The phrase "cunning saint" brings together two contradictory qualities—'cunning' implies deceit, while 'saint' implies virtue. This contrast within a single expression is characteristic of an oxymoron.

Option (A) → Metaphor: A metaphor is a direct comparison between two unrelated things, saying one is the other. There is no such comparison in the given sentence.

Option (B) → Simile: A simile compares two different things using the words "like" or "as." The sentence does not contain such a comparison.

Option (C) → Alliteration: Alliteration is the repetition of initial consonant sounds in closely placed words. While "cunning" and "saint" are nearby, they do not repeat the same initial sound, so alliteration is not present.