What is the synonym of 'Zealous'?

• Zealous:
English meaning: enthusiastic and eager.
Bangla meaning: উদ্দীপনাময়; গভীর অনুভূতিবহ; আগ্রহোদ্দীপক।

Options,
ক) Clever:
English meaning: having or showing the ability to learn and understand things quickly and easily.
Bangla meaning: চালাক; চতুর; দক্ষ।

খ) Watchful:
English meaning: paying careful attention and ready to deal with problems.
Bangla meaning: প্রহরারত; জাগ্রত; বিনিদ্র।

গ) Envious:
English meaning: wishing you had what another person has.
Bangla meaning: হিংসুক; পরশ্রীকাতর।

ঘ) Fervent:
English meaning: showing strong and sincere feelings or beliefs.
Bangla meaning: গরম; তৃপ্ত; গনগনে।

অপশন বিবেচনা করে দেখা যায়, the synonym of 'zealous' - Fervent.

Source: Cambridge & Accessible Dictionary.