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#55715 Bangla Language & Literature চৌম্বকবিদ্যা Level 0

ক্যাসেট প্লেয়ারের টেপে কি ব্যবহৃত হয়?

  1. A CrO2
  2. B CuSO4
  3. C MnO2
  4. D Na2(SO2)3
Answer: A - CrO2

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