To promote value addition of livestock products, Punjab has established:

The correct answer is: d) All of the above.

Punjab has established milk processing units, meat processing plants, and feed mills to promote value addition of livestock products.

Milk processing units are used to produce milk products such as milk powder, cheese, and yogurt. Meat processing plants are used to produce meat products such as beef, pork, and chicken. Feed mills are used to produce animal feed.

The establishment of these facilities has helped to increase the value of livestock products and create jobs in the agriculture sector.