The answer is B because : A=<span>The oppositely-charged ions are arranged in a regular way to form a giant ionic lattice. It is a 'lattice' because the arrangement is a regular one and 'giant' because the arrangement is repeated many times with large numbers of ions. Ionic compounds often form crystals as a result. B=</span><span>Gabbro is a dark, medium- to coarse-grained
intrusive igneous rock composed of calcium plagioclase, pyroxene, and
minor olivine, but no quartz. It is the intrusive equivalent of a
basalt. C=</span><span>The crystallization of an organic compound can produce a mixture of crystalline solids with different solid-state structures (polymorphs).[1] No convenient method now exists to separate crystals of a single polymorph from a mixture of crystals of different polymorphs. D= a fire formed crystal and that is not a rock. </span>
