Select the INCORRECTLY spelt word.

Correct option is C

Option (c) is the incorrectly spelt word.
Correct spelling is: Posthumously – It means occurring, awarded, or appearing after the death of the originator. (मरणोपरांत)
Example: The soldier was posthumously awarded the Param Vir Chakra.
Meanings of all the given options:
· (a) Cushion: A soft pillow or pad. (गद्दी)
· (b) Scientist: A person engaged in science. (वैज्ञानिक)
· (c) Posthumusly: Incorrect spelling. Correct: Posthumously – after death. (मरणोपरांत)
· (d) Laboratory: A place for scientific research or experiments. (प्रयोगशाला)
✍️ Part of Speech: Posthumously – adverb