"I must confess that in my quest, I felt depressed and restless."
Which figure of speech is used in the above line?

Correct option is B

Assonance is the repetition of vowel sounds within words in a line of poetry. In this line, we see a repetition of the "e" sound in "quest," "depressed," and "restless," creating a rhythmic effect. Since assonance is based on vowel sounds rather than meaning, this is the best answer.