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স্মার্টফোন কত সালে আবিষ্কার হয় ?

Ferdows blog

প্রশ্নঃ স্মার্টফোন কত সালে আবিষ্কার হয় ?

প্রশ্নঃ স্মার্টফোন কোন সালে আবিষ্কার হয় ?

ক. ১৯৯২

খ. ১৯৯৪

গ. ১৯৮৯

ঘ. ২০১৩

উত্তরঃ ১৯৯৪

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