GK | General Science | সাধাৰণ বিজ্ঞান | Part 2 

General Science for competitive exams | Part 2
Link for part 1: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-EBkNzYXi0vg.htmlsi=fZfi8t9xN-ayj8YU
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