Antonym of BENIGN

gracious
sinister
novel
humane

The correct answer is B. Sinister.

Benign means kind, gentle, or harmless. Sinister means evil or threatening.

Gracious means kind, courteous, or generous. Novel means new or unusual. Humane means kind or compassionate.

Sinister is the antonym of benign because it means evil or threatening, while benign means kind, gentle, or harmless.