1 . Organization of Islamic Conference (OIC) was established in which year?
- A. 1971
- B. 1979
- C. 1980
- D. 1981
- D. None
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বাংলাদেশ সেতু কর্তৃপক্ষ (সহকারী পরিচালক) 09-10-2020 || 2020
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