which of the following is arrange in the order of decreasing electropositive character

a-Fe, Mg, Cu

b- Mg,Cu,Fe

c-Mg,Fe,Cu

d-Cu,Fe,Mg

The correct option is (c).  The order is to be explained on the basis of reactivity series. The decreasing order of electropositivity from the reactivity series will be as follows:
Mg>Fe>Cu

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