The right option is; A. Aircraft windows, medicines, and electronics
You are likely to find gold in aircraft windows, medicines, and electronics.
Gold is a heavy yellow elemental metal of great value. Great is a very useful metal because it has various special properties. It conducts electricity, has a good color and a brilliant luster, and it can be melted and cast into distinct shapes. Gold is commonly used in jewelry and coins. Gold is used in aircraft windows, it is used as a drug to treat some medical conditions and a small amount of gold is used in almost all electronics such as calculators, cell phones and global positioning system (GPS) units.