Select the INCORRECTLY spelt word.

Correct option is D

Option (d) is incorrectly spelt word.
Correct spelling is “Imaginary”.
Meanings of all options-
 Grammar - The set of rules governing the structure of language.
 Swindle - To deceive or cheat someone, typically to obtain money or goods dishonestly.
 Kindergarten - A preschool for children typically aged 3-5 years old.
 Imaginary - Something that exists only in the imagination or is not real.