Correct Option
The correct option is Its per capita income level.
Explanation
The World Bank classifies economies into four income groups: low, lower-middle, upper-middle, and high income. This classification is updated annually on July 1 and is based on Gross National Income (GNI) per capita (calculated using the World Bank Atlas method) of the previous calendar year.
Option Analysis
- Its low literacy rate. is incorrect: Literacy rate is a social indicator used in indices like the Human Development Index (HDI) by the UNDP, but it is not the primary metric for the World Bank's income-based classification.
- Its high dependence on agriculture. is incorrect: While a high dependence on agriculture is a characteristic often associated with developing economies, the World Bank does not use sectoral composition (agriculture vs. industry vs. services) as the defining criterion for income categorization.
- Its per capita income level. is correct: The World Bank strictly uses GNI per capita to categorize countries. India is classified as a lower-middle-income economy because its GNI per capita falls within the specific threshold defined for this group (e.g., between $1,136 and $4,465 for the fiscal year 2024).
- Its high population density. is incorrect: Population density is a demographic metric and does not determine a country's economic income classification.
Key Takeaway: The World Bank classifies countries solely based on GNI per capita (Atlas method), whereas the United Nations Development Programme (UNDP) uses a broader range of indicators (health, education, standard of living) for the Human Development Index.