This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Physiology
Kussmaul's breathing is seen in 
Select and explain. 
A. Metabolic acidosis, B. Metabolic alkalosis, C. Respiratory acidosis, D. Respiratory alkalosis
A: Metabolic acidosis
Answer: A: Metabolic acidosis 
Explanation: Kussmaul breathing is a deep and labored breathing pattern often associated with severe metabolic acidosis, paicularly diabetic ketoacidosis (DKA) but also kidney failure. Ref: guyton and hall textbook of medical physiology 12 edition