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
[{'content': 'The following is used to assess breathing pattern: \nSelect and explain. \nA. Spirometry, B. Barometer, C. All, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Spirometry: It is the most common of the lung function tests It is used to assess breathing patterns and diseases like cystic fibrosis,asthama, pulmonary fibrosis,COPD Ref: Guyton and Hall textbook of medical physiology 12th edition, page number:324,325', 'role': 'assistant'}]