Task: Question Answering
Input (English): Question: Peritoneal dialysis is a depurative technique that is characterized because: 
 Options:  <1> It is necessary to always administer heparin through the peritoneal catheter. <2> It is indicated in patients with respiratory problems of a restrictive type. <3> Does not produce significant hemodynamic alterations. <4> Requires daily and nightly solution exchanges every four hours. <5> Water and toxic substances are eliminated by ultrafiltration.
Output (English): 3