A. Switzerland
B. English
C. America
D. France
🧠 Explanation:
The word “solder” usually refers to the tin-lead alloy, but in some applications, lead and zinc can also be mixed to form a bonding material. This combination produces a softer alloy with specific industrial uses. Such alloys are used where strong corrosion resistance is required. The mixture improves durability for joints exposed to moisture and heat. Modern solder types may use zinc, silver, or copper as alternatives to reduce environmental hazards while still providing effective bonding.
