It is light in weight, a good conductor of electricity and used extensively in the manufacture of aircraft. This is a valid description of

The description provided in the question fits the properties of aluminum. Aluminum is a lightweight metal with a low density, high strength-to-weight ratio, and is a good conductor of electricity. It is extensively used in the manufacture of aircraft, automobiles, and other transportation equipment due to its strength and lightness. Therefore, the correct option is Aluminum.