Answer:
The correct answer is the option C.Fluoride.
Step-by-step explanation:
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Let's solve this!
We know that ionic bonding is the type of bond that is made between a nonmetal and a metal. In this type of union one of the elements yields electrons and the other accepts electrons.
As in this case, the metal is Lithium, we need a nonmetal to complete the union.
Let's see the options:
Beryllium is a metal.
Calcium is a metal.
Fluoride is a nonmetal.
Sodium is a metal.
After the analysis we conclude that the correct answer is Fluoride since it is the only one that is a nonmetal.