Correct Answer: Trisulphur

Solution : The correct option is Trisulfur

Trisulfur, often represented as S3, is not an allotrope of carbon. Trisulfur refers to a molecule composed of three sulfur atoms, while allotropes of carbon include forms like diamond, graphite, graphene, carbon nanotubes, and fullerenes, among others. Carbon allotropes have different structural arrangements of carbon atoms, giving them distinct physical and chemical properties.