Task: Question Answering
Input (English): Question: The control of vital signs is fundamental in the assessment of the neurological patient. Many neurological disorders can present alterations of the respiratory pattern or frequency, indicating damage to the respiratory center or the nervous system. One of these abnormal breathing patterns, present in meningitis or cases of supratentorial injury, is Cheyne-Stokes respiration, characterized by: 
 Options:  <1> Regular frequency and superficial character. <2> Absence of clearly observable breathing. <3> A series of breaths that increase in amplitude / intensity to a maximum point in which they begin to decrease, followed by an apnea pause. <4> Slow and regular breaths with a frequency less than 10 per minute. <5> It is an abnormal and sustained increase in both depth and respiratory rate.
Output (English): 3