Answer : Lithium and beryllium.
Explanation :
The flow of electric charge constitute electric current. For the conduction of electricity, the elements must have free electrons because they are free to move anywhere so the metals conduct electricity.
In the given options, Lithium and beryllium are metals. Fluorine,and carbon are non metal. Boron is a metalloid. Neon is a noble gas.
So, the elements that conducts electricity are lithium and beryllium.
Hence, the correct option is (A).