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#52866 Bangla Language & Literature তরঙ্গ ও শব্দ Level 0

কিসের সাহায্যে সমুদ্র ও কুয়ার গভীরতা নির্ণয় করা হয়?

  1. A প্রতিধ্বনি
  2. B প্রতিফলন
  3. C প্রতিসরণ
  4. D প্রতিসরাঙ্ক
Answer: A - প্রতিধ্বনি

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