Task: Question Answering
Input (English): Question: Graphite: 
 Options:  <1> It gives intercalation compounds with fluorine. <2> Reacts with sodium to give a covalent compound with C ̶ Na bond. <3> Reacts with sodium to give intercalation compounds that have the same distance between layers that pure graphite had. <4> Reacts with sodium to give intercalation compounds that are better electrical conductors than pure graphite. <5> It gives covalent compounds with bromine with C ̶ Br bond.
Output (English): 4