6490. The man vehemently denied all the charges of corruption that were levelled against him.

✅ The correct answer is option C.
Devoutly : in a manner that shows deep religious feeling or commitment.

Hysterically : with wildly uncontrolled emotion.

Forcefully : in a strong and assertive manner; vigorously.

Serenely : in a calm, peaceful, and untroubled manner.

Vehemently : in a forceful, passionate, or intense manner; with great feeling.

Synonym of Vehemently is Forcefully