The correct answer is: a) Eggs.
Eggs are a high-quality protein source that is in high demand around the world. Assam is a major producer of eggs, and the state has the potential to export a significant amount of eggs to other countries.
Yak wool is a high-quality fiber that is used to make clothing and other products. However, yak wool is not as widely used as other types of wool, and there is not a large demand for it in the global market.
Pork is a popular meat in many parts of the world, but it is not a major export product from Assam. This is because there are religious and cultural restrictions on the consumption of pork in some parts of the world.
Feathers are used in a variety of products, including pillows, duvets, and clothing. However, the demand for feathers is not as high as the demand for other livestock products, such as eggs and meat.
In conclusion, eggs are the livestock product from Assam that has the most potential for export.