The antonym of the word 'Zeal' is-

The correct answer is apathy

Zeal
- Bangla meaning: সতেজতা ও উদ্দীপনা
- English meaning: Eagerness and ardent interest in pursuit of something

Apathy
- Bangla meaning: Lack of interest or concern.
- English meaning: সমবেদনা বা আগ্রহের অভাব।

Other Options:
ক) Enthusiasm
- Bangla meaning: প্রবল উৎসাহ।
- English meaning: Strong excitement of feeling : ardor.

খ) Empathy
- Bangla meaning: অন্যের আবেগ-অনুভূতির সঙ্গে একাত্ম হওয়ার ক্ষমতা।
- English meaning: The action of understanding, being aware of, being sensitive to, and vicariously experiencing the feelings, thoughts, and experience of another.

গ) Sympathy
- Bangla meaning: সহানুভূতি; সমবেদনা; দরদ; কারুণ্য; অনুকম্পা; অনুবেদনা।
- English meaning: An affinity, association, or relationship between persons or things wherein whatever affects one similarly affects the other.

Source:
1. Merriam-Webster dictionary
2. Accessible Dictionary
3. Cambridge Dictionary