Which of the following is not a primary cess?
A. Carbon zinc
B. Silver oxide
C. Silver zinc
D. Nickel - cadmium
Answer: C
Which of the following is not a primary cess?
A. Carbon zinc
B. Silver oxide
C. Silver zinc
D. Nickel - cadmium
Answer: C
A. Carbon zinc
B. Silver oxide
C. Silver zinc
D. Nickel - cadmium
Answer: C
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