Correct Answer:
Option C —
Reflective
Explanation:
Impulsive means acting or done quickly without thought or planning (rash, hasty).
Reflective means thoughtful, deliberate, and given to deep contemplation before taking action—making it the exact antonym.
Meaning of other options:
Impetuous: Acting quickly and without care (synonym).
Whimsical: Subject to erratic, sudden, or unpredictable impulses (synonym/related).
Unpremedicated: Not treated with medication (unrelated, though "unpremeditated" would also be a synonym of impulsive).
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.