Synonym of OMINOUS

Answer: Option C

Poisonous : (of a substance or plant) causing or capable of causing death or illness if taken into the body.
Foregone : past.
Foreboding : a feeling that something bad will happen; fearful apprehension.
Bad : of poor quality or a low standard.
Ominous : giving the worrying impression that something bad is going to happen; threateningly inauspicious.

Synonym of Ominous is Foreboding