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Question
Which one of the following is an igneous rock?
Options:
A .  Quartzite
B .  Sandstone
C .  GranitE
D .  Shale
Answer: Option C
Answer: (c)
Igneous rock is one of the three main rock types, the others being a 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 that is formed from magma that cools and solidifies within the crust of a planet. They form the central cores of major mountain ranges.

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