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
Which of the following is the primary acid-base disorder
associated with haemorrhagic shock, diabetic ketosis and chronic renal failure? 
Select and explain. 
A. Metabolic acidosis, B. Metabolic alkalosis, C. Respiratory acidosis, D. Respiratory alkalosis
A: Metabolic acidosis
Answer: A: Metabolic acidosis 
Explanation: None