Which one of the following is correct ?

Option A is correct because Pyroxenes are a significant group of rock-forming silicate minerals found in many igneous and metamorphic rocks. They are a primary component of the Earth's upper mantle and are commonly found in meteorites, particularly stony meteorites like chondrites and achondrites.

• Option B is incorrect: Amphiboles make up only about 5-7% of the Earth's crust. Feldspars are the most abundant mineral group, forming over 50% of the crust.
• Option C is incorrect: Quartz is a highly stable mineral that is insoluble in water and resistant to chemical weathering under normal surface conditions.
• Option D is incorrect: The term 'sedimentary' is derived from the Latin word 'sedimentum', which means 'settling' or 'sinking down', referring to the deposition of particles.