Parts of the following sentence are given as options. Identify the segment that contains a grammatical error.
They were completely taking unawares by the shocking remarks of Mr. Sharma about the security of the colony.

Correct option is D

The segment that contains a grammatical error is were completely taking unawares.
The correct phrase should be "were completely taken unawares," as "taken" is the past participle needed here, not "taking".
The correct phrase to express being caught off guard is "taken unawares."
Grammatical Rule Used: The verb "take" needs to be in the past participle form "taken" to correctly form the passive voice, which is used here to indicate that the subject (they) was affected by an action done to them.
Corrected Sentence: They were completely taken unawares by the shocking remarks of Mr. Sharma about the security of the colony.
Example:
· The team was taken unawares by the sudden change in the schedule.