The correct answer is option 3, Rajasthan. The 3-tier Panchayati Raj system was first adopted by Rajasthan in the year 1959. This system was introduced to decentralize power and decision-making at the grassroots level in rural areas. Under this system, the Panchayati Raj institutions are divided into three levels: Gram Panchayat at the village level, Panchayat Samiti at the block level, and Zila Parishad at the district level. Each level has its own set of functions and responsibilities in governing and administering rural areas. It is important to note that while Rajasthan was the first state to adopt the 3-tier Panchayati Raj system, other states have also implemented it in subsequent years as per the provisions of the Constitution.