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'.

[Q]: Question: They are directly involved in allergic reactions: 
 Options:  <1> T lymphocytes. <2> Dendritic cells <3> Monocytes <4> Platelets. <5> Mastocytes
[A]: 5


[Q]: Question: The thromboxanes: 
 Options:  <1> They induce platelet aggregation. <2> They inhibit platelet aggregation. <3> They act as bronchodilators in the respiratory system. <4> They are produced in the membranes of all cells. <5> They are derived from saturated fatty acids.
[A]: 1


[Q]: Question: Among the techniques most used in Beck's Cognitive Therapy to identify or detect cognitive schemes is: 
 Options:  <1> The technique of the descending arrow. <2> To promote a new image. <3> The repetition of goals. <4> The self-instructions <5> The behavioral experiment.
[A]:
1