Task: Question Answering
Input (English): Question: Regarding the exercises with the incentive spirometer, it is true that: 
 Options:  <1> They stimulate the patient to inhale quickly and deeply. <2> The patient must be in the supine position. <3> Spirometers can be of three types: volume, flow or pressure. <4> They are also called sustained maximum inspiration exercises. <5> All are false.
Output (English): 4