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'.

Q: Question: In the determination of water hardness due to the presence of Ca2 + and Mg2 + ions, the titrant reagent is used: 
 Options:  <1> Methyl orange. <2> A standard solution of potassium chloride. <3> Black Eriochrome T. <4> A standard solution of ethylenediaminetetraacetic acid (EDTA). <5> A solution of AEDT previously standardized against a solution of potassium phthalate.

A: 4
****
Q: Question: A 20-year-old boy goes to the emergency room for fever of 39ºC, chills, papules and hemorrhagic pustules on the distal extensor surfaces of the extremities and arthritis of the knee. What is your diagnosis of initial suspicion? 
 Options:  <1> Rheumatoid arthritis. <2> Reiter syndrome. <3> Urica Drop <4> Gonococcal arthritis. <5> Vasculitis of Cogan.

A: 4
****
Q: Question: Young's schema therapy for personality disorders derives from: 
 Options:  <1> The therapy of acceptance and commitment. <2> The emotive rational therapy. <3> Cognitive therapy of Beck. <4> Cognitive assessment therapy. <5> Interpersonal therapy

A:
3
****