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: Physiology
[{'content': "The following diagram shows the depth of respiration of a 45 year old man, who suffered a head injury in an automobile accident. This crescendo decrescendo pattern of breathing is known as: \nSelect and explain. \nA. Apnea, B. Biot's breathing, C. Cheyne stokes breathing, D. Hyperpnea", 'role': 'user'}, {'content': "Answer: C \nExplanation: Cheyne-Stokes breathing is the most common type of periodic breathing. The person breathes deeply\xa0 for a short interval and then breathes slightly or not at all for an additional interval. This pattern\xa0 repeats itself about every minute. Apnea is a transient cessation of respiration. So, it is true that\xa0Cheyne Stokes breathing is associated with periods of apnea.\u200b\n\u200bBiot's breathing refers to sequences of uniformly deep gasps, apnea, and then deep gasps.\u200b\nHyperpnea means increased breathing, usually referring to increased tidal volume with or without\xa0 increased frequency.\u200b\nTachypnea means increased frequency of breathing.", 'role': 'assistant'}]