The correct answer is Option 3 Explanation & Key Takeaways: • Iron, gold, and copper are commonly found in igneous rocks. These minerals often crystallize from magma as it cools and solidifies. • Limestone and gypsum are found in sedimentary rocks. They are formed from the accumulation of sediments and organic material over time. • Mica and garnet are typically found in metamorphic rocks. They form under heat and pressure during the metamorphism of pre-existing rocks. • Option 'c' is incorrect. Mica and garnet are generally found in metamorphic rocks, Important Notes: • Igneous rocks: These are formed from the cooling and solidification of magma or lava. Examples include granite and basalt. Minerals like iron, copper, and gold are often found in these rocks. • Sedimentary rocks: These rocks are formed by the deposition of material at the Earth's surface and within bodies of water. Examples include sandstone, limestone, and gypsum. These rocks are rich in minerals like gypsum, halite, and limestone. • Metamorphic rocks: These are formed when existing rocks are subjected to heat and pressure, causing physical or chemical changes. Examples include schist and gneiss. Mica and garnet are commonly found in these rocks. Related Concepts: • Iron, Gold, and Copper: These metals are often associated with igneous and volcanic activity. They occur as native elements or in combination with other elements in mineral ores. • Limestone and Gypsum: Limestone is formed primarily from the accumulation of shell, coral, algal, and fecal debris, while gypsum forms through the evaporation of saline water in shallow basins. • Mica and Garnet: These minerals are key components of metamorphic rocks. Mica forms in sheet-like structures, while garnet forms as hard, crystalline minerals.