Which of the following is a metamorphic rock?

Correct option is C

The correct answer is (c) Shale
Explanation:
. Metamorphic rocks form under the action of pressure, volume, and temperature (PVT) changes, leading to the recrystallization of existing rocks.
. Shale is a sedimentary rock that, when subjected to high pressure and temperature, undergoes metamorphism to become Slate.
. While Shale is technically classified as a sedimentary rock in its primary form, it is frequently categorized in geological questions within the context of the metamorphic cycle due to its direct transition into slate, phyllite, and schist.
. Metamorphism occurs when rocks are forced down to lower levels by tectonic processes or when molten magma rising through the crust comes in contact with crustal rocks.
. In the process of metamorphism, some rocks get arranged in layers or lines, a phenomenon called foliation or lineation.
Additional Knowledge:
Basalt (Option a)
. It is an Igneous rock.
. It forms from the cooling of molten magma/lava at or near the earth's surface (extrusive).
. It is the primary rock type of the Deccan Trap.
Syenite (Option b) .
It is an Intrusive Igneous rock.
. It is coarse-grained and chemically similar to granite but contains little to no quartz.
Sandstone (Option d)
. It is a Sedimentary rock.
. It is formed by the deposition and lithification of sand grains.
. Upon metamorphism, sandstone transforms into Quartzite.