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'.

[EX Q]: Question: Azidothymidine (AZT) used against the human immunodeficiency virus: 
 Options:  <1> It binds to the cellular RNA polymerase and blocks transcription. <2> It binds to the early promoter of the virus and prevents its recognition by RNA polymerase. <3> Antagonizes the phosphorylation of nucleosides, thus inhibiting the synthesis of viral DNA. <4> Blocks the transport of thymidine to the cellular interior. <5> Inhibits transcriptase
[EX A]: 5

[EX Q]: Question: They can be part of the B lymphocyte receptor on the cell surface: 
 Options:  <1> IgM and IgG. <2> IgD and IgG. <3> IgD and IgM. <4> IgA and IgM. <5> IgG and IgE.
[EX A]: 3

[EX Q]: Question: Retentive encopresis is characterized by: 
 Options:  <1> Absence of constipation <2> Being significantly more frequent than non-retentive encopresis. <3> Decreased rectal accommodation. <4> Being associated with alterations in the perception of rectal distension. <5> Decrease in the contractile capacity of the external anal sphincter.
[EX A]:
2