The first step of seed processing is

Answer: Option C

The first step of seed processing is basic cleaning.
Processing of seeds is done based on one or more different physical characters of the seed which are seed size, length, weight, shape, surface texture, colour, affinity to liquid and electrical conductivity.
In processing, the first phase consists of scalping, debearding, hulling, and shelling to make the seed flow readily through the grader and cleaner (conditioning and basic cleaning).
The second phase includes the removal of inert material, weed seeds, and other crop and broken seeds that are larger or smaller than the crop seed.
In the final (separating and upgrading) phase, undesirable materials are separated from the seed.