Which industry analyses and separates different elements from the same materials?

Analytical industry

The correct answer is option 2- Analytical industry.

Manufacturing industries may be further divided into four categories on the basis of method of operation for production.

* Analytical industry which analyses and separates different elements from the same materials, as in the case of oil refinery. 

* Synthetical industry which combines various ingredients into a new product, as in the case of cement.

* Processing industry which involves successive stages for manufacturing finished products, as in the case of sugar and paper.

* Assembling industry which assembles different component parts to make a new product, as in the case of television, car, computer, etc.