As of 2021, which is the world's largest drainage basin with an area of about 70,00,000 km2?

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Accepted Answer

Step-by-step explanation:

1. A drainage basin (or watershed) is the area of land where precipitation collects and drains off into a common outlet; the largest basin is the one with the greatest area.
2. Approximate areas of the listed basins are:
   - Congo basin: around $3{,}680{,}000\ 	ext{km}^2$
   - Amur basin: about $1{,}855{,}000\ 	ext{km}^2$
   - Amazon basin: about $7{,}000{,}000\ 	ext{km}^2$
   - Nile basin: about $3{,}400{,}000\ 	ext{km}^2$
3. Comparing these, the Amazon basin is the largest by area (approximately $7{,}000{,}000\ 	ext{km}^2$).

Therefore the correct choice is the Amazon basin (option 3), which corresponds to letter c.

FINAL_ANSWER: c

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