Question:

Which of the following is a Metamorphic rock?

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Marble is formed by metamorphism of limestone, so marble is a metamorphic rock.
  • Sandstone
  • Lime stone
  • Marble
  • Basalt
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The Correct Option is C

Solution and Explanation

Metamorphic rocks are formed when existing rocks are changed by heat, pressure, or chemically active fluids. The word metamorphic means: \[ \text{changed form}. \] Limestone is a sedimentary rock. When limestone is subjected to high temperature and pressure, it changes into marble. Thus: \[ \text{Limestone} \longrightarrow \text{Marble}. \] Therefore, marble is a metamorphic rock. Sandstone is a sedimentary rock. Limestone is also a sedimentary rock. Basalt is an extrusive igneous rock. Hence, among the given options, the metamorphic rock is: \[ \text{Marble}. \]
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