Select the option that can be used as a one-word substitute for the given group of words.
The supervisor in the examination hall.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. Invigilator.
One-word Substitution Concept: A single word that replaces a descriptive phrase
Grammatical Explanation:
The phrase is "The supervisor in the examination hall"
Invigilator is the correct term for someone who supervises students during an exam
Teacher is a general instructor
Monitor is usually a student assistant
Principal is the head of a school
Correction: Invigilator
Final Sentence: The invigilator is the supervisor in the examination hall.
Conclusion: The most appropriate one-word substitute is Invigilator because it exactly describes the role of supervising exams.