The Tamil Nadu Public Distribution System (PDS) is a vital program aimed at ensuring:

Food security
Land reforms
Free healthcare
Compulsory education

The correct answer is: a) Food security.

The Tamil Nadu Public Distribution System (PDS) is a vital program aimed at ensuring food security for the people of Tamil Nadu. The PDS provides subsidized food grains, such as rice and wheat, to ration card holders. The PDS also provides other essential commodities, such as sugar, kerosene, and cooking gas, at subsidized rates.

The PDS is a major source of food for the poor and vulnerable sections of the population. It helps to ensure that they have access to affordable food, even during times of economic hardship. The PDS also helps to stabilize prices of essential commodities and prevent inflation.

The PDS has been in operation in Tamil Nadu since the 1960s. It has been expanded and improved over the years to meet the changing needs of the people. The PDS is now one of the largest and most efficient public distribution systems in the world.

The PDS has been a major success in ensuring food security for the people of Tamil Nadu. It has helped to reduce hunger and malnutrition, and has improved the quality of life of the poor. The PDS is a vital program that has made a significant contribution to the development of Tamil Nadu.

The other options are incorrect because they are not the primary goals of the PDS. Land reforms are aimed at ensuring that land is distributed fairly and that farmers have access to land. Free healthcare is aimed at providing affordable healthcare to all citizens. Compulsory education is aimed at ensuring that all children have access to education.