A. Copper, silver and zinc
B. Copper, nickel and zinc
C. Silver, tin and zinc
D. Silver, nickel, and zinc
Free MCQs for FPSC, NTS, PPSC, PMS, CSS & All Pakistan Exams 2026
A. Copper, silver and zinc
B. Copper, nickel and zinc
C. Silver, tin and zinc
D. Silver, nickel, and zinc