Select the incorrectly spelt word.

Correct option is D

Option (d) is the incorrectly spelt word.
Correct spelling is: Precautionary – meaning done as a preventive measure. (एहतियाती)
Example: The authorities imposed precautionary measures to prevent an outbreak.
Meanings of all the given options:
· (a) Congratulations – expression of praise (बधाई)
· (b) Hibernation – deep rest or sleep (शीतनिद्रा)
· (c) Antecedent – something that comes before (पूर्ववर्ती)
· (d) Precautionery – Incorrect; should be Precautionary (एहतियाती)