Correct Answer: (d) A is false, but R is true
Solution:As per World Migration Report 2000, the estimated number of international migrants in the world was 173 million, which was 2.8 percent of the total population of the world. In 2000, the region with the highest proportion of international migrants was Oceania. As per World Migration Report 2022, the estimated number of international migrants is 281 million, which is 3.6% of the total population of the world. Oceania is still the region with the highest proportion of international migrants. Hence, as per the question period and also at present, option (d) is the correct answer. As per the World Development Report, 2023, the estimated number of international migrants is 184 million, which is 2.3 percent of the total population of the world.