Identify the misspelt word

Correct option is D

Option (d) is incorrectly spelt word.
Correct spelling is: “Obfuscate” — to make something unclear or confusing deliberately; to obscure the meaning. (Hindi meaning: अस्पष्ट करना / भ्रमित करना)
Example: The spokesperson tried to obfuscate the issue with vague answers.
Meanings of all the given options:
· (a) Antediluvian: extremely old-fashioned; from before the biblical flood (प्राचीन/पुराना)
· (b) Infinitesimal: extremely small; almost immeasurable (अत्यंत सूक्ष्म)
· (c) Persiflage: light, teasing conversation; banter (हल्की-फुल्की मज़ाकिया बातचीत)
· (d) Obfescate (incorrect): misspelling; correct is obfuscate (अस्पष्ट करना)