instruction:
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:
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.
answer:
2


question:
Question: The following may occur in multimeric form associated with the J chain: 
 Options:  <1> IgA and IgG. <2> IgD and IgM, <3> IdE and IgD. <4> IgA and IgD. <5> IgA and IgM.
answer:
5


question:
Question: Which of the following answers is true about the HLA molecules? 
 Options:  <1> They are very polymorphic nuclear proteins. <2> They are divided into molecules of class IgG, IgA and IgM. <3> They join peptides and present them on the cell surface. <4> They interact with cytokines to modulate the immune response. <5> They are monomorphic.
answer:

3