Correct Option: D

Igneous rock is one of the three main rock types, the others being sedimentary and metamorphic rock. In terms of modes of occurrence, igneous rocks can be either intrusive (plutonic), extrusive (volcanic) or hypabyssal. Granite is an intrusive igneous rock which is formed from magma that cools and solidifies within the crust of a planet. They form central cores of major mountain ranges.