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: For which of the following children's problems has the effectiveness of the symbolic modeling technique been demonstrated? 
 Options:  <1> Childhood depression <2> Behavioral disorders associated with ADHD. <3> The autism <4> The shyness. <5> The selective mutism.
[EX A]: 4

[EX Q]: Question: Organomagnesium compounds are commonly referred to as: 
 Options:  <1> Lipshutz <2> Birch. <3> Grignard. <4> Noyori <5> Blanc.
[EX A]: 3

[EX Q]: Question: The T lymphocyte receptor (TCR): 
 Options:  <1> Experience change of class. <2> Does not experience affinity maturation. <3> It transmits signals to the T lymphocyte on its own. <4> It has two sites of antigen recognition such as antibodies. <5> Performs effector functions mediated by its constant regions.
[EX A]:
2