Synonym of DILIGENT

Answer: Option A

Industrious : diligent and hard-working.
Intelligent : having or showing intelligence, especially of a high level.
Modest : unassuming in the estimation of one's abilities or achievements.
Energetic : showing or involving great activity or vitality.
Diligent : having or showing care and conscientiousness in one's work or duties.

Synonym of Diligent is Industrious