Select the INCORRECTLY spelt word.

Correct option is C

Option (c) is the incorrectly spelt word.
Correct spelling is: Centenarian – A person who is 100 years old or older. (Hindi: शतायु व्यक्ति)
Example: My grandfather is a proud centenarian, having celebrated his 100th birthday last year.
Meanings of all the given options:
· (a) Aquatic: Related to water. (Hindi: जल संबंधी)
· (b) Notorious: Famous for something bad. (Hindi: कुख्यात)
· (c) Centenarian: A person who has reached the age of 100. (Hindi: शतायु)
· (d) Mercenary: A person primarily concerned with making money at the expense of ethics. (Hindi: स्वार्थी सैनिक या धन के लिए काम करने वाला)