This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: JIPMER 2018, Subject name: Medicine
Interpret the following ABG values: PcCo2 - 40, HCO3 - 55 mEq/L and pH - 7.7:- 
Select and explain. 
A. Uncompensated metabolic alkalosis, B. Mixed respiratory and metabolic acidosis, C. Combined respiratory and metabolic acidosis, D. Compensated respiratory acidosis
A: Uncompensated metabolic alkalosis
Answer: A: Uncompensated metabolic alkalosis 
Explanation: None