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Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode | |
A. | occurs higher in the electro-chemical series of metals. [Wrong Answer] |
B. | is exemplified by magnesium plate. [Wrong Answer] |
C. | is much cheaper than the cathodic base material to be guarded against corrosion. [Wrong Answer] |
D. | all (a), (b) & (c). [Correct Answer] |