The correct option is C Abrin
Abrin is a poisonous secondary metabolite found in the seeds of rosary pea.
Carotenoids are pigments found in plants, certain fungi and algae.
Curcumin is a constituent present in turmeric which is used in drugs.
Monoterpenes belong to the class of terpenoids which are a class of secondary metabolites. They are aromatic in nature and are used in soaps and perfumes.