Select the most appropriate option to fill in the blank in the following sentence:-

The ____ rumble of the thunder hinted at the approaching danger, filling the air with a sense of unease.

portentous

The correct answer is Option (4) → portentous

Portentous means of or relating to a portent (a sign or warning that something momentous or calamitous is likely to happen); ominous or warning. This perfectly matches the context of thunder that hints at approaching danger and creates unease.

• Pretentious: Attempting to impress by affecting greater importance, talent, or culture than is actually possessed. (Describes people or behavior, not a natural sound.)

• Contentious: Causing or likely to cause an argument; controversial. (Unrelated to a warning sign.)

• Tenuous: Very weak or slight; fragile. (Describes strength or firmness, the opposite of a noticeable rumble.)