Correct Answer:
C. Falsely
The correct answer is Falsely. "Truthfully" means speaking or acting in a way that is honest and true. Its opposite (antonym) is falsely, which means in a manner that is incorrect, untrue, or deceptive.
Antonyms and Word Meanings
- Truthfully: In accordance with fact or reality; honestly and without falsehood.
- Falsely: In an untrue or deceitful manner; opposite of truthfully.
- Why Other Options Are Not Antonyms:
- Honestly: Synonymous with truthfully, not an antonym.
- Sincerely: Also synonymous — meaning genuine and truthful.
- Frankly: Means openly and honestly, again a synonym.
- Example: "He truthfully answered the question" vs. "He falsely answered the question." The two words are direct opposites.
Hence, the antonym of "Truthfully" is Falsely.