The correct answer is (b). The 73rd Amendment came into effect on 24th April, 1993.
The other options are correct.
(a) Panchayat system has been an integral part of Indian village life through the ages.
The panchayat system is a traditional system of self-governance in India. It has been in existence for centuries and is an important part of Indian culture. The panchayat system is based on the principle of local democracy, and it gives villagers a say in how their villages are run.
(c) It is a three-tier organically linked structure.
The panchayat system is a three-tier structure, with village panchayats at the lowest level, block panchayats at the intermediate level, and district panchayats at the highest level. The three tiers are organically linked, and they work together to promote development at the local level.
(d) Art. 243-G of the Indian Constitution adds to its importance.
Article 243-G of the Indian Constitution provides for the establishment of panchayats at the village, intermediate, and district levels. It also provides for the powers and functions of panchayats, and for the devolution of powers and responsibilities to them. Article 243-G has added to the importance of the panchayat system, and it has helped to strengthen local democracy in India.