In the given sentence, identify the segment which contains the grammatical error.
The government has announced a gradual reboot of air travel who was halted two months ago due to lockdown.

Correct option is D

Option (d) contains an error.
Explanation: “Who was halted” is incorrect because “who” refers to persons. Here, “air travel” is a thing, not a person, so the correct relative pronoun is “which”.
Correct sentence: The government has announced a gradual reboot of air travel which was halted...
Grammatical rule used:
· Use “who” for people
· Use “which” for things
· Use “that” for both people and things (in restrictive clauses)
Example:
Incorrect: The car who broke down was new.
Correct: The car which broke down was new.