Identify the segment in the sentence which contains a grammatical error.
The two buses moving side by side gave the illusion of been stationary.

Correct option is D

Option (d) contains an error.
· The phrase "of been stationary" is incorrect. The correct phrase should be "of being stationary." The verb "been" is the past participle of "be" and is used with auxiliary verbs like "have" or "has." In this context, "being" is the correct form because it functions as a gerund (a verb acting as a noun) to describe the state of the buses.
· Grammatical rule used: A gerund (verb + ing) is used after prepositions like "of" to describe actions or states.
· Example: "She had the sensation of being watched." Here, "being" correctly follows the preposition "of" to describe the sensation.