This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: JIPMER 2017, Subject name: Forensic Medicine
[{'content': 'Enzyme that can be traced in semen sample of 8 - 10 weeks is: \nSelect and explain. \nA. Acid Phosphatase test, B. ALP test, C. LDH, D. CPK enzyme', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Spermatozoa contains high concentration of creatine phosphokinase which is more than double then found in any other body fluid the enzyme is stable and can be demonstrated even in old stains of 6 months.', 'role': 'assistant'}]