Statistics for Most Populous Border Cities

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Hint	Answer	Closest Country	% Correct
23,480,000	Seoul	North Korea	98%
14,122,000	Buenos Aires	Uruguay	93%
15,669,000	Dhaka	Myanmar	91%
11,587,000	Kinshasa	Republic of the Congo	89%
14,667,000	Kolkata	Bangladesh	89%
3,906,000	Rome	Vatican City	89%
6,456,000	Toronto	United States	88%
8,957,000	Ho Chi Minh City	Cambodia	85%
5,624,000	Singapore	Malaysia	85%
6,225,000	Santiago	Argentina	82%
13,123,000	Lagos	Benin	81%
5,257,000	Milan	Switzerland	80%
4,069,000	Berlin	Poland	78%
3,933,000	Dubai	Oman	76%
10,052,000	Lahore	India	74%
4,127,963	Montreal	United States	69%
4,283,000	Kuwait City	Saudi Arabia	59%
4,635,000	Kabul	Pakistan	56%
3,806,000	Busan	Japan	55%
4,420,000	Xiamen	Taiwan	46%
3,962,000	Fuzhou	Taiwan	27%
6,710,000	Quanzhou	Taiwan	14%