Correct Answer:
Option B - Gneiss is a high grade metamorphic rock formed by the metamorphosis of granite, which is a sedimentary rock. It is typically associated with major mountain building episodes. It is mainly formed due to presence of high pressure and temperature deep in the ground.
B. Gneiss is a high grade metamorphic rock formed by the metamorphosis of granite, which is a sedimentary rock. It is typically associated with major mountain building episodes. It is mainly formed due to presence of high pressure and temperature deep in the ground.