Is Mumbai a city or district?

Related questions

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2. Why was Bombay changed to Mumbai Quora?
3. Is Mumbai and Bombay same?
4. Is Mumbai a world city?
5. Should Mumbai be separated from Maharashtra?
6. Why India changed its city name?
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Tags

1. #along
2. #suburban
3. #konkan
4. #metropolis
5. #division
6. #maharashtra
7. #district
8. #headquarters
9. #makes
10. #mumbai
11. #subdivisions