This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Electrolyte Imbalance, Subject name: Medicine
[{'content': 'A CKD patient is having protracted vomiting episodes. pH=7.42, pC02= 40, HCO3= 25, Na= 140mEq, Chloride= 95mEq and HCO3= 25mEq. Comment on the diagnosis. \nSelect and explain. \nA. Metabolic acidosis and metabolic alkalosis, B. Metabolic acidosis and compensated respiratory alkalosis, C. Metabolic acidosis and respiratory acidosis, D. Normal ABG repo with normal electrolytes', 'role': 'user'}, {'content': 'Answer: A \nExplanation: CKD - M. acidosis Vomiting - M. alkalosis (| Aldosterone) Anion gap = Na+ - (Cl-+ HCO3-) = 140 - (95 + 25) = 140 - 120 High anion gap = 20 meq', 'role': 'assistant'}]