Answer:
c. graphene.
Explanation:
Graphene -
It is one of the allotropic form of the carbon atom , which consists of one single layer of atoms , that are linked in a two dimensional fashion , is referred to as graphene .
It is a form of very large aromatic molecule .
Graphene is structural element of the allotropes likes , fullerene , charcoal , graphite and carbon nanotubes .
Hence , from the given information of the question ,
The correct option is c. graphene .
