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: It has superficial cells with abundant glycogen: 
 Options:  <1> Language. <2> Esophagus. <3> Thin skin <4> Vagina. <5> Thick skin.
[EX A]: 4

[EX Q]: Question: Which of the following situations would noticeably decrease the transcription of a gene? 
 Options:  <1> The presence of a repressor and an inducing molecule. <2> The binding of RNA polymerase to DNA. <3> The presence of a repressor and a correpressor molecule. <4> The presence of an activator and its signal molecule. <5> The presence of a mutated repressor that could not bind to DNA.
[EX A]: 3

[EX Q]: Question: What group of amino acids, when they are part of the proteins, can be phosphorylated? 
 Options:  <1> Val, Ser, Thr. <2> Phe, Ala, Gly. <3> Val, Glu, Asp. <4> Tyr, Ser, Thr. <5> Lys, Ser, Ile.
[EX A]:
4