TASK DEFINITION: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
PROBLEM: Question: The determination of cyanide by the Liebig method is based on the addition of a silver nitrate standard solution: 
 Options:  <1> Until complete precipitation of silver cyanide. <2> Until the precipitation of silver cyanide begins. <3> Until the appearance of a red precipitate of silver chromate. <4> Until the AgCN complex is quantitatively formed. <5> Until the precipitation of silver iodide, yellow.

SOLUTION: 2

PROBLEM: Question: Affective rigidity is characterized by: 
 Options:  <1> Rapid changes in mood. <2> Affective expression is discordant with the situation. <3> Absence of reactive positive feelings. <4> Inability to modulate affect depending on situations. <5> Little intense emotional responses.

SOLUTION: 4

PROBLEM: Question: After the reaction of some xenobiotics with glutathione, the final product is formed: 
 Options:  <1> Sulfanil urea. <2> Reduced glutathione <3> Oxidized glutathione. <4> Thiosulfate. <5> Mercapturic acid.

SOLUTION:
5