1 . According to the scientists, how many galaxies are there in the universe?
- A. 10 million
- B. 100 million
- C. 10 billion
- D. 200 billion
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বাংলাদেশ সিকিউরিটি প্রিন্টিং কর্পোরেশন || Assistant Manager (Production Control) (08-09-2023) || 2023
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