alleryতলৰ কোনটো অ'জন স্তৰ ক্ষয়কাৰী পদাৰ্থসমূহৰ ব্যৱহাৰ নিয়ন্ত্ৰণ আৰু পৰ্যায়ক্ৰমে বন্ধ কৰাৰ বিষয়টোৰ সৈতে জড়িত?
Aব্ৰেটন উডছ সন্মিলন
Bমণ্ট্ৰিল প্ৰট'কল
Cকিয়'ট' প্ৰট'কল
Dনাগয়া প্ৰট'কল
Answer & Solution
Correct answer: B. মণ্ট্ৰিল প্ৰট'কল
UPSC CSE Prelims 2015 (GS-I, Set A), Q.40। অফিচিয়েল উত্তৰ কী: B।
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