What is the most stable mineral during the process of weathering?

Correct option is A

The correct answer is (a) Quartz
Quartz is recognized as one of the most stable minerals during the process of weathering. Quartz's chemical structure makes it highly resistant to weathering under surface conditions compared to many other common minerals. It is composed of silicon dioxide (SiO2), which is chemically very stable and has a strong resistance to breaking down under typical weathering conditions such as rain, wind, and temperature changes. This stability is why quartz is commonly found in sand and sediment after other less stable minerals have decomposed.
In contrast, minerals like olivine, pyroxene, and amphibole are more susceptible to chemical breakdown when exposed to weathering.