The correct answer is: Slaughterhouse modernization.
Tamil Nadu has been a pioneer in the modernization of slaughterhouses in India. The state government has set up a number of modern slaughterhouses, which have helped to improve the quality and safety of meat products. The state has also implemented a number of measures to promote the welfare of animals, including the establishment of a state animal welfare board.
The other options are incorrect because:
- Export of live animals: Tamil Nadu does not have a large export market for live animals.
- Leather processing: Tamil Nadu is a major producer of leather, but the state government has not implemented any specific policies to promote the leather processing industry.
- Backyard piggery: Backyard piggery is not a major livestock-related activity in Tamil Nadu.
In conclusion, Tamil Nadu follows a progressive policy for slaughterhouse modernization. The state government has set up a number of modern slaughterhouses, which have helped to improve the quality and safety of meat products. The state has also implemented a number of measures to promote the welfare of animals.