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'.

Question: What studies should be performed in an adenocarcinoma with prominent mucinous differentiation of ascending colon diagnosed in a 32-year-old man? 
 Options:  <1> Reorganization of the MYC gene. <2> Analysis of microsatellite instability. <3> Study of mutations of the RET gene. <4> Study of BRCA1-2 mutations. <5> Studies of TP53 mutations.
2

Question: Acetylsalicylic acid is a compound whose pKa is 3.5. What percentage of a dose of this product can be absorbed in the stomach fasting (pH 1.5)? 
 Options:  <1> Less than 10% <2> Between 10% and 20%. <3> More than 90% <4> Between 20% and 40%. <5> 50%
3

Question: The prodromal phase of a psychotic episode is characterized by: 
 Options:  <1> A deviation from emotional, cognitive, behavioral or social functioning and the presence of nonspecific symptoms. <2> Being a critical period during which the person should be treated. <3> The appearance of the first psychotic episode. <4> Be comparable to what is called the duration of untreated psychosis. <5> The functional recovery of the patient, which causes that it can be incorporated into working life gradually.

1