সঠিক উত্তর হচ্ছে: টোকিও
ব্যাখ্যা: Tokyo is the world’s most populous city with 37,393,000 people, this number is leveling out due to declining birth rates and an aging population.\n1. Tokyo (Population: 37,435,191)\n2. Delhi (Population: 29,399,141)\n3. Shanghai (Population: 26,317,104)\n4. Sao Paulo (Population: 21,846,507)\n5. Mexico City (Population: 21,671,908)\n6. Cairo (Population: 20,484,965)\n7. Dhaka (Population: 20,283,552)\n8. Mumbai (Population: 20,185,064)\n9. Beijing (Population: 20,035,455)\n10. Osaka (Population: 19,222,665)