This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thanatology, Subject name: Forensic Medicine
[{'content': "Zasko's phenomenon is seen during \nSelect and explain. \nA. Rigor mois, B. Decomposition, C. Primary relaxation, D. Secondary relaxation", 'role': 'user'}, {'content': "Answer: C \nExplanation: Tendon reaction or Zasko's phenomenon: It occurs after somatic death when molecular death has not occurred. All muscles are in a relaxed state after death. This is a stage of primary relaxation. It is a muscular response to mechanical stimuli that occurs after 1- 2 hrs after death during the primary flaccidity period When the lower third of the quadriceps femoris muscle is struck above the patella with a reflex hammer, it causes an upward movement of the patella because of contraction of the whole muscle. Muscle changes after death :", 'role': 'assistant'}]