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
A 55ps old male presents with tachypnea and mental confusion. Blood glucose 350mg/dL pH 2.7 What is the most likely acid base disorder 
Select and explain. 
A. metabolic alkalosis, B. Respiratory alkalosis, C. Metabolic acidosis, D. Respiratory acidosis
C: Metabolic acidosis
Answer: C: Metabolic acidosis 
Explanation: The condition of patient is D K A ref : harrisons 21st ed