1.

If gold number of `A, B, C, and D` are `0.005, 0.05, 0.5 and 5` respectively , then which of the following will have the highest protective powerA. AB. BC. CD. D

Answer» Correct Answer - A
Protective power`prop(1)/("Gold number")`
Gold number of A is least, therefore, it has the highest protective power.


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