Antonym of VALIDATE

Answer: Option D

Validate : check or prove the validity or accuracy of.
Legalise : make (something that was previously illegal) permissible by law.
Spurious : not being what it purports to be; false or fake.
Authenticate : prove or show (something) to be true, genuine, or valid.
Disprove : prove that (something) is false.

Antonym of Validate is Disprove