Wheat flour can be separated from wheat bran by? 

There are many separation techniques. Filtration is the separation of impurities from a liquid. Because wheat flour and wheat bran come in various sizes, it is possible to separate the two. Wheat flour is smaller than wheat bran in terms of particle size. The method used to separate particles from liquids is called filtration. This substance might be a gas or a liquid. However, since wheat bran and flour are both solid particles, filtering cannot be used to separate them.

When the weight of the components in a mixture varies from one another, the separation procedure known as winnowing may be utilized. However, as is well known, there is not a significant weight difference between wheat flour and wheat bran. As a result, the separation of wheat flour and wheat bran cannot be accomplished using this method.

The combinations in which the components differ in size, shape, and color are separated via handpicking. However, because they are so minute and have a similar hue, wheat flour and bran are difficult to distinguish by hand picking.

When the mixture's constituent parts are of varying sizes, the sieving procedure is used. Since wheat busk is coarser than wheat flour, this is well known. Wheat bran particles of a larger size remain on the sieve as wheat flour flows through it. As a result, wheat bran and flour are separated via sieving.

Hence, option D is correct.