Correct Answer: C
Explanation:
Meaning: Clandestine is used to describe something that is done in secret.
Clandestine is something conducted with or marked by hidden aims or methods.
Example: Your clandestine method to steal my chocolates won’t work.
Synonyms: Covert, Fraudulent, Furtive, Hidden, Underground
Antonyms: Authorized, Legal, Known, Open, Public