A. copper
B. aluminium
C. both (A) and (B)
D. copper and silver
E. platinum and gold
Correct Answer: both (A) and (B) ✔
Last Updated: December 22, 2018
A. copper
B. aluminium
C. both (A) and (B)
D. copper and silver
E. platinum and gold
Correct Answer: both (A) and (B) ✔
Last Updated: December 22, 2018