Which of the following is NOT a type of ESG bond?

Debenture bonds are traditionally categorized as corporate bonds that are not backed by any specific collateral but are based on the issuer's creditworthiness. They do not inherently align with environmental, social, or governance (ESG) criteria for impact investing.

In contrast, the other types mentioned—green bonds, social impact bonds, and sustainability-linked bonds—are specifically designed to fund projects with positive environmental or social impacts. Green bonds finance environmentally beneficial projects, social impact bonds support initiatives aimed at addressing social issues, and sustainability-linked bonds offer incentives tied to achieving sustainability targets. Therefore, identifying debenture bonds as the option that does not belong to the category of ESG bonds highlights their distinction from the other types that are directly associated with ESG objectives.