“Rule of Law Index” is released by which of the following?

The correct option is World Justice Report.

The Rule of Law Index is an quantitative assessment tool published annually by the World Justice Project (WJP) (often referred to in options as the World Justice Report / Project). It measures how the rule of law is experienced and perceived in practical, everyday situations by the general public and legal experts worldwide.

The index evaluates countries across eight primary factors:

1. Constraints on Government Powers
2. Absence of Corruption
3. Open Government
4. Fundamental Rights
5. Order and Security
6. Regulatory Enforcement
7. Civil Justice
8. Criminal Justice

Therefore, the organization responsible for releasing the Rule of Law Index is the World Justice Project / World Justice Report.