Answer: b. good B; good A
Step-by-step explanation:
According to the Heckscher-Ohlin model, a country should export the good that is has a relative abundance in and import the good it has relative scarcity in.
Find out labor to land ratio of both countries:
Country Alpha = 45 / 15 = 3
Country Beta = 200 / 100 = 2
Country Alpha has 3 labor units per acre
Country Beta has 2 labor units per acre
Country Alpha therefore has more labor abundance and should export the labor intensive good which is good A which means Country B will import A.
Country Beta should export more land intensive good which is good B.