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
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