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: The pyramidal neurons are in: 
 Options:  <1> Cerebellum. <2> Brain. <3> Spinal cord. <4> Spinal ganglia. <5> Hypophysis.
[EX A]: 2

[EX Q]: Question: In the scheme of the stages of Tanner's pubertal development, the stage or level 5 in women corresponds to: 
 Options:  <1> Light bulge of the breast button and increase of the areolar size. <2> Growth of the breast, presence of light pubic hair and roundness of the hips. <3> Slight mammary protrusion and beginning of roundness of the hips. <4> Full development of the breast and triangle of full pubic hair as in adult women. <5> The beginning of the thelarchy.
[EX A]: 4

[EX Q]: Question: The independent parameter of the dissolution model, the solution efficiency, has two limitations. One of them is that the last experimental point has an arbitrary nature. What is the other limitation ?: 
 Options:  <1> At least 50% of the dose must be dissolved. <2> At least 60% of the dose must be dissolved. <3> At least 75% of the dose must be dissolved. <4> At least 80% of the dose must be dissolved. <5> At least 90% of the dose must be dissolved.
[EX A]:
5