Antonym of AMBIGUOUS

Answer: Option C

Ambiguous : open to more than one interpretation; not having one obvious meaning.
Obscure : not discovered or known about; uncertain.
Secular : not connected with religious or spiritual matters.
Explicit : stated clearly and in detail, leaving no room for confusion or doubt.
Equivocate : use ambiguous language so as to conceal the truth or avoid committing oneself.

Antonym of Ambiguous is Explicit