Q. In a given year in India, official poverty lines are higher in some States than in others because (UPSC Prelims 2019)
Answer: price levels vary from State to State
Notes: The correct answer is [B] price levels vary from State to State. In India, poverty estimation is based on the cost of a specified basket of goods and services required to meet basic needs.

• Price Levels (Statement B – Correct): Poverty lines are expressed in monetary terms (e.g., per capita consumption expenditure per month). Since the cost of living and the prices of essential commodities—such as food, fuel, and clothing—differ across states due to transport costs, local production, and market efficiency, the monetary threshold to buy the same basic "poverty basket" varies.
• Poverty Rates (Statement A – Incorrect): The poverty rate is the result of applying the poverty line to the population; it does not determine where the line is set.
• Gross State Product (Statement C – Incorrect): While GSDP reflects the economic size of a state, it is an indicator of output and income, not the specific cost of basic subsistence for a household.
• Public Distribution System (Statement D – Incorrect): While the PDS affects the actual welfare of the poor by providing subsidized grains, the official poverty line calculation (traditionally based on methodologies like those of the Tendulkar or Rangarajan Committees) focuses on price levels in the open market to determine the minimum expenditure required.

Consequently, a person might be considered "above the poverty line" in a state with lower costs but "below" it in a state with higher costs, even with the same nominal income.