The correct answer is A. Copper and Zinc.
Brass is an alloy of copper and zinc. It is a hard, corrosion-resistant metal that is often used in plumbing, hardware, and musical instruments. The proportions of copper and zinc in brass can vary, but the most common type of brass is 70% copper and 30% zinc.
Copper is a reddish-brown metal that is found in nature. It is a good conductor of heat and electricity, and it is also used in coins, jewelry, and other decorative items. Zinc is a white metal that is also found in nature. It is used in batteries, galvanizing steel, and other industrial applications.
When copper and zinc are mixed together, they form a solid solution. This means that the atoms of copper and zinc are randomly distributed throughout the alloy. The properties of brass depend on the proportions of copper and zinc in the alloy. For example, brass with a higher percentage of copper is harder and stronger than brass with a lower percentage of copper.
Brass is a versatile metal that has many uses. It is often used in plumbing because it is corrosion-resistant and easy to work with. Brass is also used in hardware, such as doorknobs and hinges. It is also used in musical instruments, such as trumpets and trombones.