Which of the following is incorrectly spelled?

Correct option is D

Option (d) is incorrectly spelt word.
Correct spelling is: “Obsolescence” — it means the state of being no longer produced or used; becoming outdated or falling into disuse. (Hindi: अप्रचलन, पुराना पड़ जाना)
Example: Rapid technological advances can lead to the obsolescence of older devices within a few years.
Meanings of all the given options:
· Vanquish: to defeat thoroughly or overcome completely. (Hindi: परास्त करना, जीत लेना)
· Scrumptious: extremely tasty; delicious. (Hindi: बहुत स्वादिष्ट, लज़ीज़)
· Capitulation: the action of surrendering or ceasing to resist; an act of yielding. (Hindi: समर्पण, आत्मसमर्पण)
· Obsolesence (incorrect) → Obsolescence: state of being outdated or no longer in use. (Hindi: अप्रचलन)