Correct choice is (c) Preparation of enzymes
The explanation: In the diagram above, a flowchart of the preparation of enzymes is shown. Most of the commercial enzymes are produced extracellularly by microbe, plants or animal cells into the cell further processed. Once the cells enzymes are in solution along with other materials, solid liquid separation may be performed. This helps to remove cell debris or unwanted cells. Further, the precipitate is collected by filtration, centrifugation or aqueous biphasic partition. Once the enzyme is purified, the product concentrated and final finishing is done to produce the enzyme.