18) B

Number of gold medals won by China = 51
Total number of medals won by China = 100
Ratio = 51:100 ≈ 1:2

Number of gold medals won by US = 36
Total number of medals won by US = 110
Ratio = 36 :110 ≈ 1:3

Number of gold medals won by Russian Federation = 23
Total number of medals won by Russian Federation = 72
Ratio = 23 :72 ≈ 1:3

Number of gold medals won by GB = 19
Total number of medals won by GB = 47
Ratio = 19 : 47 ≈ 1 : 2.5

GB would still be ranked 2nd above US and Russian Federation

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