1. Buckminsterfullerene is an allotropic form of (a) phosphorus (b) sulphur (c) carbon tin

Answer is (c) carbon

Explanation:

Diamond, Graphite, Lonsdaleite, C60 (Buckminsterfullerene or buckyball), C540, C70, Amorphouscarbon, and h) single-walled carbon nanotube, or buckytube. Are the allotropes of Carbon.