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মোবাইল ফোন কত সালে আবিষ্কার হয় ?

Ferdows blog

প্রশ্নঃ মোবাইল ফোন কত সালে আবিষ্কার হয় ?

প্রশ্নঃ মোবাইল ফোন আবিষ্কার হয় কোন সালে ?

ক. ১৯৯৩

খ. ১৯৭৩

গ. ১৯১৭

ঘ. ১৯৮০

উত্তরঃ ১৯৭৩

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