Select the INCORRECTLY spelt word.

Correct option is C

The correct answer is "(c) Weired."
· The correct spelling is "Weird."
Until – Up to a certain point in time; before a particular time or event.
Example: Wait here until I return.
Vacuum – A space completely devoid of matter, or a device used for cleaning by suction.
Example: He used a vacuum cleaner to remove the dust.
Separate – To set apart or divide into distinct parts; not joined or connected.
Example: They decided to separate their work and personal lives.
Thus, option (c) "Weired" is incorrect.