14:I[5014,["/_next/static/chunks/11d1gk4m2o846.js","/_next/static/chunks/14mrh2-p_w84d.js","/_next/static/chunks/40y9lkvta2o_p.js"],"default"] 15:I[38392,["/_next/static/chunks/11d1gk4m2o846.js","/_next/static/chunks/14mrh2-p_w84d.js","/_next/static/chunks/40y9lkvta2o_p.js"],"PracticeCard"] 17:I[70570,["/_next/static/chunks/11d1gk4m2o846.js","/_next/static/chunks/14mrh2-p_w84d.js","/_next/static/chunks/40y9lkvta2o_p.js"],"ExamAppearanceBadge"] 16:T67d,

• The antonym of 'controversy' is - unanimity.

• Controversy (noun)
- English Meaning: a discussion marked especially by the expression of opposing views: dispute; a disagreement, quarrel, strife.
- Bangla Meaning: বিতর্ক; বিরোধ; মতান্তর; কোনো সামাজিক, নৈতিক বা রাজনৈতিক প্রশ্ন নিয়ে দীর্ঘস্থায়ী বাদানুবাদ।

• Given options:
ক) Placidity:
English meaning: the fact of being calm and peaceful, with very little movement.
Bangla meaning: শান্ততা; প্রসন্নতা।

খ) Bickering
English Meaning: petty and petulant quarreling especially when prolonged or habitual.
Bangla Meaning: খুঁটিনাটি বা গুরুত্বহীন বিষয় নিয়ে ঝগড়া করা

গ) Unanimity
English Meaning: agreement by all people involved; consensus; the quality or state of being unanimous.
Bangla Meaning: ঐকমত্য; মতৈক্য।

ঘ) Composure:
English meaning: the state of being calm and in control of your feelings or behaviour.
Bangla meaning: শান্তি; স্থৈর্য; আত্মসংবরণ।

• সুতরাং, অপশনের অর্থ বিবেচনা করে দেখা যায় যে, The antonym of 'controversy' is - unanimity.

Source:
1. Accessible Dictionary by Bangla Academy.
2. Merriam-Webster Dictionary.