Select the correctly spelt word.

Correct option is D

Option (d) is the correctly spelt word.
Correct spelling is: “ octogenarian” — meaning a person who is from 80 to 89 years old; someone in their eighties (अस्सी वर्ष का/की व्यक्ति; अस्सी के दशक का व्यक्ति). The term comes from Latin octogenarius.
Example: The octogenarian writer received a lifetime achievement award.
Meanings of all the given options:
· (a) octoganarian — Incorrect spelling intended for octogenarian (गलत वर्तनी).
· (b) octigenarian — Incorrect spelling intended for octogenarian (गलत वर्तनी).
· (c) octgenarian — Incorrect spelling intended for octogenarian (गलत वर्तनी).
· (d) octogenarian — Correct: a person aged 80–89 (अस्सी-वर्षीय).
Same-word spelling note (parts of speech): Octogenarian functions as both a noun and an adjective.
· Noun: He is an octogenarian.
· Adjective: An octogenarian athlete finished the race.