The correct answer is: a) Welfare of migrant workers.
The Inter-State Migrant Workmen Act, 1979 is an Act of the Parliament of India that provides for the welfare of inter-state migrant workers. The Act defines an inter-state migrant worker as a person who is employed in a job in a state other than the state in which he is ordinarily resident. The Act provides for a number of measures for the welfare of inter-state migrant workers, including:
- Registration of inter-state migrant workers
- Provision of accommodation and other facilities
- Payment of wages
- Social security benefits
- Protection against exploitation
- Grievance redressal
The Act also provides for the establishment of a Central Advisory Board and State Advisory Boards to oversee the implementation of the Act.
Option b) is incorrect because the Act does not focus on the prevention of illegal migration. The Act is only concerned with the welfare of inter-state migrant workers, regardless of whether they are legal or illegal migrants.
Option c) is incorrect because the Act does not focus on data collection on migration. The Act does not require states to collect data on inter-state migrant workers.
Option d) is incorrect because the Act does not focus on skill development for migrants. The Act does not provide for any measures to promote skill development among inter-state migrant workers.