Exp) Option a is the correct answer.

The 73rd Amendment Act was passed in 1992 and came into effect on 24th April 1993 which inserted Part IX consisting of Article 243 to 243-O, and the Eleventh Schedule enumerating 29 functional items. The Act gave certain powers to the state government to constitute gram panchayats at a local level and provide them with all the necessary assistance to operate as a unit of self-governance.

Statement 1 and 2 are correct: The compulsory (obligatory or mandatory) provisions of the 73rd Constitutional Amendment Act (1992) or the Part IX of the Constitution are:

1. Organisation of Gram Sabha in a village or group of villages.
2. Establishment of panchayats at the village, intermediate and district levels.
3. Direct elections to all seats in panchayats at the village, intermediate and district levels.
4. Indirect elections to the post of chairperson of panchayats at the intermediate and district levels.
5. 21 years to be the minimum age for contesting elections to panchayats.
6. Reservation of seats (both members and chairpersons) for SCs and STs in panchayats at all the three levels.
7. Reservation of one-third seats (both members and chairpersons) for women in panchayats at all the three levels.
8. Fixing tenure of five years for Panchayat at all levels and holding fresh elections within six months in the event of supersession of any Panchayat.
9. Establishment of a State Election Commission for conducting elections to the Panchayat.
10. Constitution of a State Finance Commission after every five years to review the financial position of the Panchayat.

Statement 3 is incorrect: Giving representation to members of the Parliament (both the Houses) and the state legislature (both the Houses) in the panchayats at different levels falling within their constituencies are the voluntary provisions under 73rd Constitutional Amendment Act.