Solution:
Concept- One of the allotropes of carbon is fullerene. Buckminsterfullerene is another name for fullerene. The carbon molecules in this allotropic type of carbon are organised in a series to create a cage-like shape. The fullerene structure is hollow.When the carbon molecules are organised in this allotropic form in a cylindrical shape, they create a tube-like structure. Carbon nanotubes are the name for these structures that resemble tubes. In fullerenes, carbon atoms are bonded in a spherical shape.
Buckminster fullerene has 60 carbons in its form. Fullerene is applicable in the medical field to target tumour cells and to deliver the drug to a particular tissue. Due to poor solubility in polar solvents, fullerenes are used as catalysts. They are also used as lubricants, as when inserted between two surfaces, the contact between metals can be decreased.
Thus, all the given options are uses of fullerenes.
Hence, the correct answer is option 4.
