Select the option that expresses the given sentence in passive voice.
They will have to pull down this building as they have not complied with the building regulations of the city.

Correct option is B

The correct passive voice of the given sentence is (b).
Rules for converting active to passive voice:
1. Structure of active voice:
· They will have to pull down this building.
· "Will have to" remains unchanged, and "pull down" is converted into "will have to be pulled down".
2. Structure of passive voice:
· "This building will have to be pulled down by them".
3. "They have not complied with" → "The building regulations have not been complied with" (Retains meaning).
Example:
· Active: They will have to complete the project by next week.
· Passive: The project will have to be completed by them by next week.