The correct answer is: c) 1992.
The 73rd Constitutional Amendment Act, which strengthened Panchayati Raj Institutions, was enacted in 1992. The Act provides for the establishment of three-tier Panchayati Raj Institutions (PRIs) at the village, intermediate and district levels in every state. The PRIs are responsible for a wide range of functions, including agriculture, rural development, education, health, and sanitation.
The 73rd Amendment Act was a landmark step in the decentralization of power in India. It has led to the empowerment of millions of people at the grassroots level and has made a significant contribution to the development of rural India.
The other options are incorrect. Option a) is incorrect because the 73rd Amendment Act was not enacted in 1959. Option b) is incorrect because the 73rd Amendment Act was not enacted in 1977. Option d) is incorrect because the 73rd Amendment Act was not enacted in 2000.