The populations and gross domestic products (GDP) in billion USD of three countries A, B, and C in the years 2000, 2010, and 2020 are shown in the figures.

The decreasing order of per capita GDP of these countries in the year 2020 is:

Correct option is A

Given Data for 2020:
Population (in millions):
· A: 16 million
· B: 138 million
· C: 22 million
GDP (in billion USD):
· A: 324 billion
· B: 2623 billion
· C: 264 billion
Concept:
Per capita GDP = Total GDP / Population.
We calculate the per capita GDP for each country in 2020.
Solution:
1. For Country A: GDP = 324 billion USD Population = 16 million Per capita GDP = 324 / 16 = 20.25 thousand USD.
2. For Country B: GDP = 2623 billion USD Population = 138 million Per capita GDP = 2623 / 138 ≈ 19.01 thousand USD.
3. For Country C: GDP = 264 billion USD Population = 22 million Per capita GDP = 264 / 22 = 12 thousand USD.
Decreasing Order of Per Capita GDP:
A (20.25) > B (19.01) > C (12).
Conclusion:
The decreasing order of per capita GDP is A, B, C.
Answer: (a) A, B, C