The question focuses on which country has comparative advantage in what production. A country would have comparative advantage in producing a good or service if it has lower opportunity cost of production.
As France produces 100 bolts of cloth, it gives up 150 barrels of wine. Hence, the opportunity cost of a bolt of cloth is 1.5 barrels of wine.
As England produces 100 bolts of cloth, it gives up 50 barrels of wine. Hence, the opportunity cost of a bolt of cloth is 0.5 barrels of wine.
As the opportunity cost of a bolt of cloth is lower for England, England has comparative advantage in cloth production. Reversely, France would have comparative advantage in wine production.
