Difficulty: Easy
Correct Answer: Stickler
Explanation:
Reasoning through options
Stickler — someone who insists on exactness and proper procedure; stickler for rules/details.
Disciplinarian — enforces discipline (often authority figure); not necessarily an “insists on details” type.
Instantaneous — adjective meaning immediate; not a person.
Boaster — braggart; unrelated to insistence on rules.
Final Answer
Stickler
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