Answer : 2. "73rd Amendment"
Explanation :

1. The provisions related to Panchayati Raj have been discussed in the original Constitution under Part 9 by the 73rd Constitutional Amendment Act, 1992 (Article 243). Part 9, under the heading ‘Panchayats’, contains provisions related to Panchayati Raj up to Articles 243-243O (243-243O).

2. Panchayati Raj Day is celebrated every year on 24 April in India as the foundation of democracy.

3. The Panchayati Raj system is the system of local self-government in rural India.

4. Panchayati Raj system was introduced in Rajasthan by the then Prime Minister Jawaharlal Nehru.

5. The Panchayati Raj system was implemented in Bagdhari village of Nagaur district on 2 October 1959.

7. Local government form was first adopted in the states of Rajasthan and Andhra Pradesh.

8. The concept of Panchayati Raj in the Indian Constitution is enshrined in the Directive Principles of State Policy.

9. The tenure of Panchayats is fixed for five years but it can be dissolved even before the tenure.

10. All types of major committees related to Panchayati Raj are as follows

- Balwant Rai Mehta Committee (1957)

- Ashok Mehta Committee (1977)

- Yes. V.K Rao Committee (1985)

- L.M. Singhvi Committee (1986)