Concept:
• Writs are written orders issued by the Supreme Court (Article 32) or High Courts (Article 226) for the enforcement of Fundamental Rights.
• There are exactly five types of writs in the Indian Constitution: Habeas Corpus, Mandamus, Quo-Warranto, Prohibition, and Certiorari.
Step 1: Evaluate standard writs
(A) Habeas Corpus: "To have the body." Used to release a person from unlawful detention.
(B) Mandamus: "We command." Issued to a public official to perform their legal duty.
(C) Certiorari: "To be certified." Issued to a lower court to quash its order due to lack of jurisdiction or error.
Step 2: Identify the non-writ term
(D) Restitutio ad integrum is a Latin term meaning "restoration to original condition."
While it is a legal principle used in civil law and international law (regarding compensation or contracts), it is not one of the constitutional writs issued by Indian courts for the enforcement of rights.
Step 3: Conclusion
Since the question asks for what is NOT a writ, option (D) is the correct choice.