The following information is about the cost ratios for two products-fish (F) and chicken (C)-in Singsong and Harmony.Assume that production occurs under conditions of constant costs and these are the only two nations in the world.If in Singsong: 1F = 2C and, in Harmony: 1F = 4C, which one of the following would not be feasible terms for trade between Singsong and Harmony?

Question

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According to the cost ratios, 1 fish is worth 2 chickens in Singsong and 4 chickens in Harmony. For trade to be feasible, the exchange rate must fall between these two values. 
A) 1 fish for 2 1/2 chicken: This is feasible since 2 1/2 chickens fall between 2 and 4.
B) 1 fish for 3 chicken: This is also feasible since 3 chickens fall between 2 and 4.
C) 1 chicken for 1/5 of a fish: This is feasible since 1/5 of a fish is worth 1/2 a chicken in Singsong (since 1 fish = 2 chickens) and 1/5 of a fish is worth 1/5 of a chicken in Harmony (since 1 fish = 4 chickens). Thus, 1/2 a chicken falls between 1/5 and 1/4 of a chicken. 
D) 1 chicken for 1/3 of a fish: This is not feasible since 1/3 of a fish is worth 1 chicken in Singsong (since 1 fish = 2 chickens) but is worth only 1/3 of a chicken in Harmony (since 1 fish = 4 chickens). Thus, 1 chicken is not within the exchange rate range of 1/2 to 1.

The Following Information Is About the Cost Ratios for Two