The following sentence has been divided into parts. One of them may contain an error.
The helicopter of the enemies / hovered exact / over their bunker.

Correct option is B

Option (b) contains an error.
Error Explanation: The word “exact” is an adjective, but here an adverb is needed to describe the verb “hovered.”
The correct form is “exactly.”
Correct sentence: The helicopter of the enemies hovered exactly over their bunker.
Grammatical rule used:
An adverb is required to modify a verb (hovered). Adjectives modify nouns, while adverbs modify verbs, adjectives, or other adverbs.
Example:
❌ She danced graceful.
✅ She danced gracefully.
�� Information Booster:
✔ Adverbs often end in -ly, and their position in a sentence is typically next to the verb they modify.