This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': 'Which of the following would make the most sense as a more specific diagnostic test of shock? \nSelect and explain. \nA. A CSF (spinal) tap to check for meningitis., B. A brainstem auditory evoked response test to see if the person can hear ok., C. A pupillary light reflex test to check how well the eyes are working., D. The measurement of serum lactate, elevated levels of which are an indicator of shock.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D:\xa0Serum lactate is one of the enzymes that can indicate the occurrence of shock.\nA:\xa0Checking for meningitis\xa0is different from the identification cardiogenic shock.\nB:\xa0Auditory sense have nothing to do with shock.\nC:\xa0The eyes could not determine the diagnosis of cardiogenic shock', 'role': 'assistant'}]