Select the INCORRECTLY spelt word.

Correct option is B

Option (b) Accelarate is the incorrectly spelt word.
• Correct spelling is: Accelerate - It refers to the action of increasing speed or making something happen sooner.
• Example: The car can accelerate from 0 to 60 mph in just a few seconds.
Meanings of all the other given options:
• (a) Calibrate: To adjust or mark something (like a measuring instrument) to ensure its accuracy.
• (c) Proliferate: To increase rapidly in number or multiply.
• (d) Insinuate: To suggest or hint something in an indirect and often unpleasant way.