This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
A person presents with the following parameters. pCO2 : 30 mm Hg, PO2 :105 mm Hg, pH : 7.45. He is having partially compensated - 
Select and explain. 
A. Metabolic acidosis, B. Metabolic allcalosis, C. Respiratory acidosis, D. Respiratory alkalosis
D: Respiratory alkalosis
Answer: D: Respiratory alkalosis 
Explanation: Increase in pH suggests alkalosis

PCO2 is decreased, this suggests respiratory alkalosis.
The metabolic component cannot be evaluated as data is not provided. So the diagnosis seems to be respiratory alkalosis.