The correct option is B Toxins - Monoterpenes, Diterpenes
Living organisms contain organic compounds which are involved in basic metabolic pathways for growth, development and reproduction are called primary metabolites. Organic compounds synthesised by plants, fungi and microbes which are not essentially involved in metabolic pathways are called secondary metabolites. They do not play any role in growth, development and reproduction.
As per the question, option b is incorrectly matched because toxins are secondary metabolites produced by plants which are Abrin and Ricin. Monoterpenes and diterpenes are terpenoids produced by plants.