The correct answer is: A) Granite.
Granite is a common decorative mineral used for construction. It is a hard, igneous rock that is composed of quartz, feldspar, and mica. Granite is often used for countertops, flooring, and other interior and exterior applications.
Marble is a metamorphic rock that is composed of calcium carbonate. It is a softer rock than granite and is often used for sculptures, countertops, and other decorative applications.
Sandstone is a sedimentary rock that is composed of sand-sized grains of quartz. It is a relatively soft rock and is often used for landscaping, construction, and other applications.
Slate is a metamorphic rock that is composed of clay minerals. It is a relatively hard rock and is often used for roofing, flooring, and other applications.
Granite is the most common decorative mineral used for construction in Karnataka. It is a hard, igneous rock that is composed of quartz, feldspar, and mica. Granite is often used for countertops, flooring, and other interior and exterior applications. It is a popular choice for construction because it is durable, attractive, and easy to work with.