The constitutional amendment that strengthened the Panchayat Raj system in India:

72nd Amendment
73rd Amendment
74th Amendment
75th Amendment

The correct answer is B) 73rd Amendment.

The 73rd Amendment to the Constitution of India, enacted in 1992, provides for the establishment of Panchayati Raj Institutions (PRIs) at the village, intermediate and district levels in every state. The amendment also provides for a three-tier system of PRIs, with the village panchayat at the lowest level, the intermediate panchayat at the intermediate level and the district panchayat at the highest level.

The 73rd Amendment has been hailed as a major step towards decentralization and empowerment of local communities. It has also been credited with bringing about significant improvements in the delivery of basic services to rural areas.

The 73rd Amendment has been implemented in all states and union territories of India. However, there have been some variations in the way in which the amendment has been implemented in different states. For example, some states have elected their panchayats directly, while others have appointed them. Some states have also given more powers to their panchayats than others.

Despite these variations, the 73rd Amendment has had a positive impact on rural India. It has helped to improve the delivery of basic services, such as education, health and sanitation, to rural areas. It has also helped to empower local communities and to promote decentralization.

The 73rd Amendment is a landmark amendment to the Constitution of India. It has had a positive impact on rural India and has helped to improve the lives of millions of people.

The other options are incorrect because they are not constitutional amendments that strengthened the Panchayat Raj system in India.