Which of the following metals is most commonly used for making the bodies of aircraft?

Correct answer: Aluminium

Explanation: ✅ Correct Answer: D) Aluminium 📚 Explanation: Aluminium is the preferred choice for aircraft construction because it is lightweight yet strong and highly resistant to corrosion. It is often used in the form of alloys, such as duralumin, to enhance its mechanical properties. Reducing the weight of the airframe is critical for improving fuel efficiency and increasing the payload capacity of the plane.