বাংলাদেশে প্রথম ডিজিটাল টেলিফোন ব্যবস্থা চালু হয় কবে?
A. ১৯৯০ সালে
B. ১৯৯১ সালে
C. ১৯৯২ সালে
D. ১৯৯৩ সালে
প্রাথমিক সহকারী শিক্ষক নিয়োগ পরীক্ষাSUB_44e7e473প্রাথমিক সহকারী শিক্ষক নিয়োগ পরীক্ষা - ⚡ অনলাইন প্রশ্নব্যাংক দেখুন 💥
সঠিক উত্তরঃ
A.
১৯৯০ সালে
Explanation:
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