The correct option is D Public Interest Litigation
Public Interest Litigation is the judicial innovation which enables any person who is public spirited or who wants to act on behalf of some people to file a case in the court. The PIL can be filed from any person and even organisation on the ground of breach of public duty and injury caused thereby, violation of constitutional provision being the prominent ground and the violation of law which is causing injury to the public or any strata of the society not able to represent themselves.