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#55302 Bangla Language & Literature শক্তির উৎস ও ব্যবহার Level 0

নিম্নোক্তগুলোর কোনটি পারমাণবিক চুল্লীতে মডারেটর হিসেবে ব্যবহৃত হয়?

  1. A কয়লা
  2. B গ্রাফাইট
  3. C সীসা
  4. D স্টীল
Answer: B - গ্রাফাইট

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