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kevincan
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Nice work , the correct answer is B.

In a yes/no data sufficiency question like this one, it’s really nice to prove to yourself that the answer is ‘yes’ by showing yourself that the answer cannot be ‘no’.

To do this , we look at the ‘no’ scenario that is close as possible to a ‘yes’ scenario. In this case, check whether it’s possible that Taraglo is the SIXTH largest city. For that to be the case , the 5 largest cities would have to account for more than 18(5) =90 % of the total country population. This is not possible , because the top 6 cities would account for 108% of the population of the country.
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