The correct answer is (c). Social Interest Litigation is not a form of public interest litigation.
Public interest litigation (PIL) is a legal action initiated by a person or group of people on behalf of the general public to seek redressal of a public wrong or a legal wrong affecting a large number of people. PILs are usually filed in the High Courts or the Supreme Court of India.
Social Action Litigation (SAL) is a type of PIL that is filed to protect the rights of marginalized or disadvantaged groups of people. SALs are usually filed by non-governmental organizations (NGOs) or individuals who are working to protect the rights of these groups.
Disadvantaged Group Litigation (DGL) is a type of PIL that is filed to protect the rights of people who are disadvantaged due to their social, economic, or political status. DGLs are usually filed by NGOs or individuals who are working to protect the rights of these groups.
Social Interest Litigation (SIL) is not a recognized form of PIL. It is a term that is sometimes used to describe PILs that are filed to promote social welfare or social justice. However, this term is not used in the legal system and there is no clear definition of what it means.