What is an antonym for "Lethargic"?

- Correct answer: Energetic.

Lethargic
- Bangla Meaning: অস্বাভাবিকভাবে নিদ্রালু; জড়িমাগ্রস্ত; অলস; নিশ্চেষ্ট।
- English Meaning: of, relating to, or characterized by laziness or lack of energy : feeling or affected by lethargy.

খ) Energetic
- Bangla Meaning: শক্তিমান, উদ্যমী, প্রাণবন্ত, অথবা কর্মঠ।
- English Meaning: operating with or marked by vigor or effect.

Other options:
ক) Sluggish
- Bangla Meaning: নিষ্ক্রিয়; মন্থরগতি।
- English Meaning: averse to activity or exertion: indolent.

গ) Listless
- Bangla Meaning: হতোদ্যম।
- English Meaning: characterized by lack of interest, energy, or spirit.

ঘ) Torpid
- Bangla Meaning: অকর্মা।
- English Meaning: sluggish in functioning or acting.

Source: Merriam-Webster Dictionary, Accessible Dictionary, Cambridge Dictionary.