Select the INCORRECTLY spelt word.

Correct option is D

Option (d) is the incorrectly spelt word.
Correct spelling is: grammar – the system and structure of a language. (व्याकरण)
Example: You need to improve your grammar to write better.
Meanings of all the given options:
· (a) Collide: to crash into something (टकराना)
· (b) Conscious: aware of and responding to surroundings (सचेत)
· (c) Existence: the fact of being real or living (अस्तित्व)