This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mechanical Injuries, Subject name: Forensic Medicine
[{'content': 'The maximal increase of free histamine content occurs within how much time after injury \nSelect and explain. \nA. 10 minutes, B. 20 - 30 minutes, C. 1 hour, D. 2 hour', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The maximal increase of free histamine content occurs within 20 -30 minutes after injury. Biochemical timing of injury: It depends upon the measurement of histamine and serotonin contents of the injured tissue. Serotonin becomes maximum in about 10 min and histamine in 20-30 min after wounding. If the stroma is damaged ,tissue cathepsins increase immediately, can be demonstrated within 5 to 10 minutes Postmoem wounds do not show any increase.', 'role': 'assistant'}]