Explanation:

- Let’s break this down. The base year for a Wholesale Price Index (WPI) is super important—it’s the year against which all other prices are compared.

- For Rajasthan’s general WPI, the base year was updated last in 2011-12. That’s what the state government and most official sources use.

- Option 1, 1999-2000, was the base year a long time back. It was replaced to reflect more current economic realities.

- Option 2, 2005-06—this one is used by some states for a while, but Rajasthan shifted beyond that.

- Option 3, 2010-11, isn’t used for Rajasthan’s WPI base; you’ll find it for some other indices or states, but not this one.

- Option 4, 2011-12, is the correct and current answer.

- This base year change helps keep stats meaningful. Every few years, it gets updated because economies change—new products, new prices, old stuff drops off.

- So, Rajasthan’s latest general WPI base year is 2011-12.