Concept:Dehusking is the agricultural operation of removing the outer sheath or husk from maize cob before grain extraction.
Explanation:A maize cob is covered by a tough leaf-like sheath called the husk.
This sheath protects the grains while the maize is still on the plant.
The process of stripping or peeling away this sheath is called dehusking.
It is commonly done by hand or with a simple mechanical device.
Shelling is different because it means separating the kernels from the cob after dehusking.
Winnowing is yet another operation used to blow away chaff from the grain.
Milling is the grinding of shelled grains into powder or meal.
Therefore, when the question asks about removal of the sheath from a maize cob, the correct term is dehusking, not shelling, winnowing, or milling.
Answer:C. dehusking