Answer:
d. magnesium fluoride
Explanation:
Magnesium fluoride is binary ionic compound composed of only two element magnesium and fluorine.
When naming these compounds the name of metal or cation is written first and anion is written after the cation. The anions are non meals.
The anion name is end with suffix " ide".
such as magnesium fluoride.
The oxidation number of metal i.e magnesium is +2. In given compound the oxidation state of fluorine is -1 that's why two atoms of fluorine are attached with one magnesium atom.