This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
[{'content': 'the blood examination of a patient with head injury reveals Ph=7.2, pco3=65mmhg,hco3= 30 meq/l? \nSelect and explain. \nA. respiratory acidosis, B. respiratory alkalosis, C. metabolic acidosis, D. metabolic alkalosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: respiratory acidosis ref : harrisons 21st ed', 'role': 'assistant'}]