The correct sequence of lac from harvesting to its preparation is:

Correct option is B

Lac is a natural resin secreted by the insect Kerria lacca, which is cultivated on host trees. The processing of lac involves several distinct stages, and the correct sequence from harvesting to final product is:
1. Stick Lac: This is the raw form of lac, harvested directly from the twigs of host trees, with lac encrustations along with insect debris and bark.
2. Seed Lac: After scraping the stick lac, it is crushed, sieved, and washed to remove impurities such as insect parts and wood. The product is then dried — this is called seed lac.
3. Dust Lac: During the sieving and refining of seed lac, fine lac particles are separated. This powdered form is referred to as dust lac.
4. Shell Lac: Seed lac is further processed by heat or solvent methods to remove wax and other impurities, and then it is melted, filtered, and stretched into thin sheets — resulting in shell lac, the purest commercial form.