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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Instantaneous rigor is seen in -
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The correct answer is  Cadaveric spasm is stiffness and rigidity of muscles immediately after death without moving into primary relaxation. Dr. Narayana Reddys Synopsis of Forensic Medicine & Toxicology 27 th edition pg. 81.