This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Surgery
[{'content': 'Which of the following indicates hypoperfusion? \nSelect and explain. \nA. Systolic BP<90 mm Hg, B. Lactic acidosis, C. Oliguria, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) All of the aboveRef: Bailey and Love Principles and Practice of Surgery, 26th ed p-13-18Indicators of hypoperfusion* Systolic BP <90mm.hg* Mean blood pressure by 30mmofHg* Acidosis* Elevated lactate level* Oliguria.', 'role': 'assistant'}]