নিচের কোনটি ব্লুটুথ অপারেশনে ব্যবহৃত হয়?
A. ম্যাগনেটিক প্রযুক্তি
B. অপটিক্যাল প্রযুক্তি
C. লেজার প্রযুক্তি
D. রেডিও প্রযুক্তি
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সঠিক উত্তরঃ
D.
রেডিও প্রযুক্তি
Explanation:
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