defence exam Agniveer Army Clerk/Store Keeper 2025 Mock Test Series General Science Physics Wave

মানুষের কানের শ্রবণশক্তি কত?

1
20 Hz থেকে 20,000 Hz
2
20 Hz এর কম
3
20,000 Hz এর বেশি
4
20 Hz থেকে 25,000 Hz
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