6671. He had the nerve to suggest that I was cheating.

✅ The correct answer is option B.
Courage : the ability to do something that frightens one; bravery.

Audacity : rude or disrespectful behaviour; impudence.

Capacity : the maximum amount that something can contain.

Strength : the quality or state of being physically strong.

Nerve : impudence or audacity.

Synonym of Nerve is Audacity