6359. He murdered the man without any qualms of conscience.

✅ The correct answer is option A.
Hesitation : the action of pausing before saying or doing something.

Pang : a sudden sharp pain or painful emotion.

Excitement : a feeling of great enthusiasm and eagerness.

Curiosity : a strong desire to know or learn something.

Qualms : an uneasy feeling of doubt, worry, or fear, especially about one’s own conduct; a misgiving.

Synonym of Qualms is Hesitation