# The pulverization of ores is done during

$(a)\;\text{Crushing and Grinding of ore} \\(b)\;\text {Handpicking of the metal ore} \\(c)\;\text{By applying the Magnetic field.} \\ (d)\;\text{None}$ .

Solution :
Crushing and pulverizing are processes in ore dressing needed to reduce valuable ores to the fine size at which thevalueless gangue can be separated from the ore. These processes are also used to reduce cement rock to the fine powderrequired for burning, to reduce cement clinker to the very fine size of portland cement, to reduce coal to the size suitable forburning in pulverized form, and to prepare bulk materials for handling in many processes.
edited Oct 23 by meena.p