I think the correct answer from the choices listed above is option D. The element that behaves most like magnesium would be strontium. It behaves most like magnesium<span> because it is in the same family, the alkaline earth metals. Hope this answers the question.</span>
In periodic table, the elements have almost same properties are present in the same group. As Mg and Sr are present in group II-A, so both behave most likely to each other due to having same valence shell electrons as well.
Si and Sn are present in group IV-A which have same behavior but different one from Mg due to different groups.
S is present in group VI-A which show different properties from all others one especially from Mg.
