The figure of speech used in "I wandered lonely as a cloud ... "?

Correct option is B

The correct answer is option (b) Simile.
Explanation: A simile explicitly compares two unlike things using like or as. In Wordsworth’s line, “ lonely as a cloud,” the speaker’s loneliness is compared to a solitary cloud using as. (Hindi: उपमा अलंकार— जैसे/जैसा या like/as द्वारा तुलना )
Meanings of all the other given options:
· (a) Hyperbole (अतिशयोक्ति): Deliberate exaggeration for emphasis. Example: “I’ve told you a million times.”
· (c) Metaphor (रूपक): An implied comparison without like/as. Example: “Time is a thief.”
· (d) Personification (मानवीकरण): Attributing human qualities to non-human things. Example: “The wind whispered.”