Option 1 is the correct answer. In 2006, the Shahgarh area of Rajasthan`s Jaisalmer district made the news due to the discovery of high-quality gas reserves. This was significant discovery having potentially huge economic value.

Let`s briefly discuss the other options:

Option 2 suggests that uranium deposits were found. While Rajasthan is indeed known to have uranium mines, there was no notable discovery in Shahgarh in 2006.

Option 3 talks about finding zinc deposits. Zinc ores do exist in Rajasthan, but not in Shahgarh.

Option 4 proposes that Shahgarh was in news for the installation of wind power units. Although Rajasthan has some wind farms, Shahgarh is not known for this. The answer may refer to other locations in Rajasthan, but specifically not Shahgarh in 2006.

So, we can confirm that option 1, the finding of high quality gas reserves, is correct.