The correct option is A Rocks
Soil is derived from weathering of rocks. Weathering can be physical (wind, water and other geological forces), chemical (oxidation, reduction and other chemical reactions) or biological (seed germination, growth of fungi, lichens and activity of microorganisms). Soil type depends on the rocks and climate of a region. As soil is derived from rocks, so the minerals present in soil also come from rocks which undergo weathering.