25 year old male patient presents with ingestion of antifreeze solution.His arterial blood has analysis report is as follows :
PH = 7.20
Anion gap = 15
PCO2 = 25
HCO3 = 10
most likely diagnosis is
anion gap =15 (high)
Difference in anion gap : 15-10= 5
Difference in HCO3 levels : 25-10=15

As difference in HCO3 levels is more than that of anion gap , this is a case of High anion gap metabolic acidosis + compensatory respiratory alkalosis + normal anion gap metabolic alkalosis.
High Anion gap metabolic acidosis
Normal Anion gap  metabolic acidosis
Both
None