This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fluid & Electrolyte, Subject name: Surgery
[{'content': 'Normal intra abdominal pressure is? \nSelect and explain. \nA. 5 mm Hg, B. 10 mm Hg, C. 15 mm Hg, D. 20 mm Hg', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ANSWER: (A) 5 mm HgREF: Sabiston 18tn ed chapter 15, Schwartz 9th ed Table 7-12Normal intra-abdominal pressure is around 5 mm Hg (range, 0.2-16.2 mm Hg). With an increase in intra-abdominal pressure, deleterious effects are observed in the intra- and extra-abdominal organs and the abdominal wallAbdominal Compartment Syndrome Grading System Bladder pressureGrademm Hgcm H20I10-1513-20II16-2521-35III26-3536-47IV>35>48', 'role': 'assistant'}]