7261. The speech he made on the occasion was quite exhilarating.

✅ The correct answer is option C.
Irrelevant : not connected with or relevant to something.

Boring : not interesting; tedious.

Lively : full of life and energy; active and outgoing.

Learned : (of a person) having acquired much knowledge through study.

Exhilarating : making one feel very happy, animated, or elated; thrilling.

Synonym of Exhilarating is Lively